Lasse Løvstakken

About

My research interests is targeted towards medical ultrasound imaging, a method where echoes from high-frequency sound waves emitted into the body can be used to make images and measure properties of tissue and blood flow. Ultrasound imaging technology has had a remarkable development in recent years, providing a basis for clearer images that can be used to obtain a more certain medical diagnosis in the future healthcare.

Follow this link to read more about one of my on-going research projects where we are developing and evaluating 3D ultrasound imaging of blood flow in the hearts of children and adults: http://blog.medisin.ntnu.no/3d-ultralydbilder-av-blodstrom-kan-gi-bedre-forstaelse-av-hjertesykdom/

Publications

2023

Sørensen, Kristian; Fadnes, Solveig; Mertens, Luc; Henry, Matthew; Segers, Patrick; Løvstakken, Lasse; Nyrnes, Siri Ann. (2023) Assessment of early Diastolic Intraventricular Pressure Difference in Children by Blood Speckle Tracking Echocardiography. Journal of the American Society of Echocardiography.
Academic article

2022

Hjorth-Hansen, Anna Katarina; Magelssen, Malgorzata Isabela; Andersen, Garrett Newton; Graven, Torbjørn; Kleinau, Jens Olaf; Landstad, Bodil; Løvstakken, Lasse; Skjetne, Kyrre; Mjølstad, Ole Christian; Dalen, Håvard. (2022) User experience and image quality influence on performance of automated real-time quantification of left ventricular function by handheld ultrasound devices: a diagnostic accuracy study with data from general practitioners, nurses and cardiologists. Open heart. volum 9 (2).
Academic article
Hjorth-Hansen, Anna; Magelssen, Malgorzata Isabela; Andersen, Garrett Newton; Graven, Torbjørn; Kleinau, Jens Olaf; Landstad, Bodil; Løvstakken, Lasse; Skjetne, Kyrre; Mjølstad, Ole Christian; Dalen, Håvard. (2022) Real-time automatic quantification of left ventricular function by hand-held ultrasound devices in patients with suspected heart failure: a feasibility study of a diagnostic test with data from general practitioners, nurses and cardiologists. BMJ Open. volum 12 (10).
Academic article
Leinan, Paul Roger; Grønli, Thomas; Skjetne, Paal; Wigen, Morten Smedsrud; Urheim, Stig; Løvstakken, Lasse; Dahl, Sigrid Kaarstad. (2022) Comparison of ultrasound vector flow imaging and CFD simulations with PIV measurements of flow in a left ventricular outflow trackt phantom - Implications for clinical use and in silico studies. Computers in Biology and Medicine. volum 146.
Academic article
Mawad, Wadi; Fadnes, Solveig; Løvstakken, Lasse; Henry, Matthew; Mertens, Luc; Nyrnes, Siri Ann. (2022) Pulmonary Hypertension in Children is associated with Abnormal Flow patterns in the Main Pulmonary Artery as demonstrated by Blood Speckle Tracking. CJC Pediatric and Congenital Heart Disease RSS Published By: Elsevier. volum 1 (5).
Academic article
Pasdeloup, David Francis Pierre; Olaisen, Sindre Hellum; Østvik, Andreas; Sæbø, Sigbjørn; Pettersen, Håkon Neergaard; Holte, Espen; Grenne, Bjørnar; Stølen, Stian Bergseng; Smistad, Erik; Aase, Svein Arne; Dalen, Håvard; Løvstakken, Lasse. (2022) Real-Time Echocardiography Guidance for Optimized Apical Standard Views. Ultrasound in Medicine and Biology. volum 49 (1).
Academic article
Pettersen, Håkon Neergaard; Sæbø, Sigbjørn; Pasdeloup, David Francis Pierre; Østvik, Andreas; Smistad, Erik; Stølen, Stian Bergseng; Grenne, Bjørnar; Løvstakken, Lasse; Dalen, Håvard; Holte, Espen. (2022) The impact of real-time feedback by deep learning during echocardiographic scanning on test-retest variability of left ventricular systolic function measurements. European Heart Journal-Cardiovascular Imaging. volum 23.
Summary/Abstract
Smistad, Erik; Dalen, Håvard; Grenne, Bjørnar; Løvstakken, Lasse. (2022) Segmentation of parasternal long axis views using deep learning. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Smistad, Erik; Østvik, Andreas; Grue, Jahn Frederik; Dalen, Håvard; Løvstakken, Lasse. (2022) Tracking-based mitral annular plane systolic excursion (MAPSE) measurement using deep learning in B-mode ultrasound. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Wifstad, Sigurd Vangen; Løvstakken, Lasse; Avdal, Jørgen; Berg, Erik Andreas Rye; Torp, Hans; Grenne, Bjørnar; Fiorentini, Stefano. (2022) Quantifying Valve Regurgitation Using 3-D Doppler Ultrasound Images and Deep Learning. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 69 (12).
Academic article

2021

Daae, Annichen Søyland; Wigen, Morten Smedsrud; Fadnes, Solveig; Løvstakken, Lasse; Støylen, Asbjørn. (2021) Intraventricular Vector Flow Imaging with Blood Speckle Tracking in Adults: Feasibility, Normal Physiology and Mechanisms in Healthy Volunteers. Ultrasound in Medicine and Biology. volum 47 (12).
Academic article
Henry, Matthew; Fadnes, Solveig; Løvstakken, Lasse; Mawad, Wadi; Mertens, Luc; Nyrnes, Siri Ann. (2021) Bicuspid aortic valve flow dynamics using blood speckle tracking in children. European Heart Journal-Cardiovascular Imaging. volum 22.
Summary/Abstract
Mawad, Wadi; Løvstakken, Lasse; Fadnes, Solveig; Grønli, Thomas; Segers, Patrick; Mertens, Luc; Nyrnes, Siri Ann. (2021) Right Ventricular Flow Dynamics in Dilated Right Ventricles: Energy Loss Estimation Based on Blood Speckle Tracking Echocardiography-A Pilot Study in Children. Ultrasound in Medicine and Biology. volum 47 (6).
Academic article
Salte, Ivar M.; Østvik, Andreas; Smistad, Erik; Melichova, Daniela; Nguyen, Thuy Mi; Karlsen, Sigve; Brunvand, Harald; Haugaa, Kristina H.; Edvardsen, Thor; Løvstakken, Lasse; Grenne, Bjørnar. (2021) Artificial Intelligence for Automatic Measurement of Left Ventricular Strain in Echocardiography. JACC Cardiovascular Imaging. volum 14 (10).
Academic article
Smistad, Erik; Ãstvik, Andreas; LÃ¸vstakken, Lasse. (2021) Annotation Web - An open-source web-based annotation tool for ultrasound images. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Smistad, Erik; Salte, Ivar Mjåland; Dalen, Håvard; Lovstakken, Lasse. (2021) Real-time temporal coherent left ventricle segmentation using convolutional LSTMs. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Smistad, Erik; Steinsland, Erik Nikolai; LÃ¸vstakken, Lasse. (2021) Real-time 3D left ventricle segmentation and ejection fraction using deep learning. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Sørensen, Kristian; Fadnes, Solveig; Salvesen, Øyvind; Mertens, Luc; Løvstakken, Lasse; Nyrnes, Siri Ann. (2021) Assessment of Regional Early Diastolic Intraventricular Pressure Gradients by Blood Speckle Tracking in Children. Journal of the American Society of Echocardiography. volum 34 (6).
Summary/Abstract
Viggen, Erlend Magnus; Løvstakken, Lasse; Merciu, Ioan Alexandru; Måsøy, Svein-Erik. (2021) Better Automatic Interpretation of Cement Evaluation Logs through Feature Engineering. IADC/SPE Managed Pressure Drilling & Underbalanced Operations Conference & Exhibition, Virtual, September 2021.
Academic chapter/article
Viggen, Erlend Magnus; Løvstakken, Lasse; Måsøy, Svein-Erik; Merciu, Ioan Alexandru. (2021) Better Automatic Interpretation of Cement Evaluation Logs through Feature Engineering. SPE Journal. volum 26 (5).
Academic article
Østvik, Andreas; Salte, Ivar Mjåland; Smistad, Erik; Nguyen, Thuy Mi; Melichova, Daniela; Brunvand, Harald; Haugaa, Kristina; Edvardsen, Thor; Grenne, Bjørnar; Løvstakken, Lasse. (2021) Myocardial Function Imaging in Echocardiography Using Deep Learning. IEEE Transactions on Medical Imaging. volum 40 (5).
Academic article

2020

Fadnes, Solveig; Sørensen, Kristian; Nyrnes, Siri Ann; Wigen, Morten Smedsrud; Løvstakken, Lasse. (2020) Intraventricular Pressure Gradients - Vector Flow Imaging versus Color M-Mode. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Golfetto, Cristiana; Ekroll, Ingvild Kinn; Torp, Hans; Løvstakken, Lasse; Avdal, Jørgen. (2020) Retrospective Transmit beamforming and Coherent Plane-Wave Compounding for Microvascular Doppler Imaging: A Comparison Study. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.
Academic article
Leclerc, Sarah; Smistad, Erik; Østvik, Andreas; Cervenansky, Frederic; Espinosa, Florian; Espeland, Torvald; Berg, Erik Andreas Rye; Belhamissi, Mourad; Israilov, Sardor; Grenier, Thomas; Lartizien, Carole; Jodoin, Pierre-Marc; Løvstakken, Lasse; Bernard, Olivier. (2020) LU-Net: A Multistage Attention Network to Improve the Robustness of Segmentation of Left Ventricular Structures in 2-D Echocardiography. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 67 (12).
Academic article
Mawad, Wadi; Fadnes, Solveig; Grønli, Thomas; Løvstakken, Lasse; Mertens, Luc; Nyrnes, Siri Ann. (2020) Children with Pulmonary Hypertension Have Abnormal Flow patterns in the Main Pulmonary Artery as Shown By High Frame Rate Ultrasound Imaging. Journal of the American Society of Echocardiography. volum 33 (3).
Summary/Abstract
Nyrnes, Siri Ann; Fadnes, Solveig; Wigen, Morten Smedsrud; Mertens, Luc; Løvstakken, Lasse. (2020) Blood Speckle-Tracking Based on High–Frame Rate Ultrasound Imaging in Pediatric Cardiology. Journal of the American Society of Echocardiography. volum 33 (4).
Academic article
Perrot, Vincent; Ekroll, Ingvild Kinn; Avdal, Jørgen; Saxhaug, Lars Mølgaard; Dalen, Håvard; Vray, Didier; Løvstakken, Lasse; Liebgott, Herve. (2020) Translation of Simultaneous Vessel Wall Motion and Vectorial Blood Flow Imaging in Healthy and Diseased Carotids to the Clinic: A pilot study. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.
Academic article
Ramalli, Alessandro; Rodriguez-Molares, Alfonso; Avdal, Jørgen; D'Hooge, Jan R M; Løvstakken, Lasse. (2020) High-Frame-Rate Color Doppler Echocardiography: A Quantitative Comparison of Different Approaches. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 67 (5).
Academic article
Salles, Sebastien; Espeland, Torvald; Rodriguez-Molares, Alfonso; Aase, Svein Arne; Hammer, Tommy; Støylen, Asbjørn; Aakhus, Svend; Løvstakken, Lasse; Torp, Hans. (2020) 3D Myocardial Mechanical Wave Measurements: Toward In Vivo 3D Myocardial Elasticity Mapping. JACC Cardiovascular Imaging. volum 14 (8).
Academic article
Salles, Sebastien; Kvåle, Kaja Frøysaa; Lervik, Lars Christian Naterstad; Støylen, Asbjørn; Løvstakken, Lasse; Samset, Eigil; Torp, Hans. (2020) Detection of Tissue Fibrosis using Natural Mechanical Wave Velocity Estimation: Feasibility Study. Ultrasound in Medicine and Biology. volum 46 (9).
Academic article
Sengupta, Partho P.; Shrestha, Sirish; Berthon, Béatrice; Messas, Emmanuel; Donal, Erwan; Tison, Geoffrey H.; Min, James K.; D'Hooge, Jan R M; Voigt, Jens-Uwe; Dudley, Joel; Verjans, Johan W.; Shameer, Khader; Johnson, Kipp; Løvstakken, Lasse; Tabassian, Mahdi; Piccirilli, Marco; Pernot, Mathieu; Yanamala, Naveena; Duchateau, Nicolas; Kagiyama, Nobuyuki; Bernard, Olivier; Slomka, Piotr; Deo, Rahul; Arnaout, Rima. (2020) Proposed Requirements for Cardiovascular Imaging-Related Machine Learning Evaluation (PRIME): A Checklist: Reviewed by the American College of Cardiology Healthcare Innovation Council. JACC Cardiovascular Imaging. volum 13 (9).
Scientific translation/review
Smistad, Erik; Østvik, Andreas; Salte, Ivar Mjåland; Melichova, Daniela; Nguyen, Thuy Mi; Haugaa, Kristina; Brunvand, Harald; Edvardsen, Thor; Leclerc, Sarah; Bernard, Olivier; Grenne, Bjørnar; Løvstakken, Lasse. (2020) Real-Time Automatic Ejection Fraction and Foreshortening Detection Using Deep Learning. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 67 (12).
Academic article
Sørensen, Kristian; Fadnes, Solveig; Wigen, Morten Smedsrud; Salvesen, Øyvind; Mertens, Luc; Løvstakken, Lasse; Nyrnes, Siri Ann. (2020) Assessment of Diastolic Intraventricular Pressure Gradients in Children by Blood Speckle Tracking. A Feasibility Study. Journal of the American Society of Echocardiography. volum 33 (3).
Summary/Abstract
Viggen, Erlend Magnus; Merciu, Ioan Alexandru; Løvstakken, Lasse; Måsøy, Svein-Erik. (2020) Automatic interpretation of cement evaluation logs from cased boreholes using supervised deep neural networks. Journal of Petroleum Science and Engineering. volum 195.
Academic article

2019

Aakervik, Anne-Lise; Løvstakken, Lasse; Torp, Hans; Aakhus, Svend. (2019) Lydbølger som er viktig for helsa. Gemini.
Popular scientific article
Karabiyik, Yücel; Avdal, Jørgen; Ekroll, Ingvild Kinn; Fiorentini, Stefano; Torp, Hans; Løvstakken, Lasse. (2019) Data Adaptive 2-D Tracking Doppler for High-Resolution Spectral Estimation. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 67 (1).
Academic article
Leclerc, Sarah; Smistad, Erik; Grenier, Thomas; Lartizien, Carole; Østvik, Andreas; Cervenansky, Frederic; Espinosa, Florian; Espeland, Torvald; Berg, Erik Andreas Rye; Jodoin, Pierre-Marc; Løvstakken, Lasse; Bernard, Olivier. (2019) RU-Net: A refining segmentation network for 2D echocardiography. Proceedings - IEEE Ultrasonics Symposium. volum 2019-October.
Academic article
Leclerc, Sarah; Smistad, Erik; Pedrosa, Joao; Østvik, Andreas; Cervenansky, Frederic; Espinosa, Florian; Espeland, Torvald; Berg, Erik Andreas Rye; Jodoin, Pierre-Marc; Grenier, Thomas; Lartizien, Carole; D'Hooge, Jan R M; Løvstakken, Lasse; Bernard, Olivier. (2019) Deep Learning for Segmentation using an Open Large-Scale Dataset in 2D Echocardiography. IEEE Transactions on Medical Imaging. volum 38 (9).
Academic article
Ramalli, Alessandro; D'Hooge, Jan; Løvstakken, Lasse; Tortoli, Piero. (2019) A Direct Measurement of Inter-Element Cross-Talk in Ultrasound Arrays. Proceedings - IEEE Ultrasonics Symposium. volum 2019-October.
Academic article
Ramalli, Alessandro; Rodriguez-Molares, Alfonso; Avdal, Jørgen; D'Hooge, Jan; Løvstakken, Lasse. (2019) High frame rate color flow echocardiography: A comparison of different imaging approaches. Journal of the Acoustical Society of America. volum 146 (4).
Academic article
Salles, Sebastien; Løvstakken, Lasse; Aase, Svein Arne; Bjåstad, Tore Grüner; Torp, Hans. (2019) Clutter Filter Wave Imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 66 (9).
Academic article
Smistad, Erik; Salte, Ivar Mjåland; Østvik, Andreas; Leclerc, Sarah; Bernard, Olivier; Løvstakken, Lasse. (2019) Segmentation of apical long axis, four- and two-chamber views using deep neural networks. Proceedings - IEEE Ultrasonics Symposium. volum 2019-October.
Academic article
Tannvik, Tomas Dybos; Rimehaug, Audun Eskeland; Wigen, Morten Smedsrud; Løvstakken, Lasse; Kirkeby-Garstad, Idar. (2019) Ventriculo-arterial interaction may be assessed by Oscillatory Power Fraction. Clinical Physiology and Functional Imaging. volum 39 (5).
Academic article

2018

Dietrichson, Fabian Sødal; Smistad, Erik; Østvik, Andreas; Løvstakken, Lasse. (2018) Ultrasound speckle reduction using generative adversial networks. Proceedings - IEEE Ultrasonics Symposium. volum 2018-October:8579764.
Academic article
Fiorito, Adrian Meidell; Østvik, Andreas; Smistad, Erik; Leclerc, Sarah; Bernard, Olivier; Løvstakken, Lasse. (2018) Detection of Cardiac Events in Echocardiography using 3D Convolutional Recurrent Neural Networks. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Grønli, Thomas; Wigen, Morten Smedsrud; Segers, Patrick; Løvstakken, Lasse. (2018) A fast 4D B-spline framework for model-based reconstruction and regularization in vector flow imaging. Proceedings - IEEE Ultrasonics Symposium. volum 2018-October.
Academic article
Iversen, Daniel Høyer; Løvstakken, Lasse; Unsgård, Geirmund; Reinertsen, Ingerid. (2018) Automatic intraoperative estimation of blood flow direction during neurosurgical interventions. International Journal of Computer Assisted Radiology and Surgery. volum 13 (5).
Academic article
Karabiyik, Yücel; Ekroll, Ingvild Kinn; Eik-Nes, Sturla; Løvstakken, Lasse. (2018) Quantitative Doppler analysis using conventional color flow imaging acquisitions. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 65 (5).
Academic article
Leclerc, Sarah; Smistad, Erik; Grenier, Thomas; Lartizien, Carole; Østvik, Andreas; Espinosa, Florian; Jodoin, Pierre-Marc; Løvstakken, Lasse; Bernard, Olivier. (2018) Deep learning applied to multi-structure segmentation in 2D echocardiography: A preliminary investigation of the required database size. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Perrot, Vincent; Avdal, Jørgen; Løvstakken, Lasse; Salles, Sebastien; Vray, Didier; Liebgott, Herve; Ekroll, Ingvild Kinn. (2018) Spatial and temporal adaptive FIR clutter filtering. Proceedings - IEEE Ultrasonics Symposium. volum 2018-October.
Academic article
Smistad, Erik; Østvik, Andreas; Salte, Ivar Mjåland; Leclerc, Sarah; Bernard, Olivier; Løvstakken, Lasse. (2018) Fully automatic real-time ejection fraction and MAPSE measurements in 2D echocardiography using deep neural networks. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Wigen, Morten Smedsrud; Fadnes, Solveig; Rodriguez-Molares, Alfonso; Bjåstad, Tore Grüner; Eriksen, Marius; STENSÆTH, KNUT HAAKON; Støylen, Asbjørn; Løvstakken, Lasse. (2018) 4-D Intracardiac Ultrasound Vector Flow Imaging-Feasibility and Comparison to Phase-Contrast MRI. IEEE Transactions on Medical Imaging. volum 37 (12).
Academic article
Østvik, Andreas; Smistad, Erik; Aase, Svein Arne; Haugen, Bjørn Olav; Løvstakken, Lasse. (2018) Real-time Standard View Classification in Transthoracic Echocardiography using Convolutional Neural Networks. Ultrasound in Medicine and Biology.
Academic article
Østvik, Andreas; Smistad, Erik; Espeland, Torvald; Berg, Erik Andreas Rye; Løvstakken, Lasse. (2018) Automatic Myocardial Strain Imaging in Echocardiography Using Deep Learning. Lecture Notes in Computer Science (LNCS). volum 11045 LNCS.
Academic article

2017

Avdal, Jørgen; Løvstakken, Lasse; Torp, Hans; Ekroll, Ingvild Kinn. (2017) Combined 2-D Vector imaging and Tracking Doppler for improved vascular blood velocity quantification. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 64 (12).
Academic article
Fadnes, Solveig; Tegnander, Eva; Nyrnes, Siri Ann; Løvstakken, Lasse. (2017) Vector Flow Imaging of Fetal Circulation using Diverging Waves. Proceedings - IEEE Ultrasonics Symposium.
Summary/Abstract
Fadnes, Solveig; Wigen, Morten Smedsrud; Nyrnes, Siri Ann; Løvstakken, Lasse. (2017) In vivo intracardiac vector flow imaging using phased array transducers for pediatric cardiology. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 64 (9).
Academic article
Grønli, Thomas; Swillens, Abigail Emily; Segers, Patrick; Løvstakken, Lasse. (2017) Real-time assimilation and regularization of ultrasound blood velocity measurements using smoothed particle hydrodynamics. Proceedings - IEEE Ultrasonics Symposium. volum 2017.
Summary/Abstract
Mawad, Wadi; Løvstakken, Lasse; Fadnes, Solveig; Mertens, Luc; Nyrnes, Siri Ann. (2017) Right ventricular flow dynamics in dilated right ventricles. Energy loss estimation based on blood speckle tracking echocardiography in children. Journal of the American Society of Echocardiography. volum 30 (6).
Summary/Abstract
Rodriguez-Molares, Alfonso; Fatemi, Ali; Løvstakken, Lasse; Torp, Hans. (2017) Specular Beamforming. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 64 (9).
Academic article
Rodriguez-Molares, Alfonso; Rindal, Ole Marius Hoel; Bernard, Olivier; Nair, Arun; Bell, Muyinatu A. Lediju; Liebgott, Herve; Austeng, Andreas; Løvstakken, Lasse. (2017) The UltraSound ToolBox. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Rodriguez-Molares, Alfonso; Torp, Hans; Lippe, Boris; Løvstakken, Lasse. (2017) Sequential CPWC: from ultrafast to ultralight. Proceedings of SPIE, the International Society for Optical Engineering. volum 10139.
Academic article
Salles, Sebastien; Aase, Svein Arne; Bjåstad, Tore Grüner; Løvstakken, Lasse; Torp, Hans. (2017) Clutter filter wave imaging (CFWI): A new way to visualize and detect mechanical waves propagation. Proceedings - IEEE Ultrasonics Symposium.
Summary/Abstract
Salles, Sebastien; Rodriguez-Molares, Alfonso; Støylen, Asbjørn; Bjåstad, Tore Grüner; Aase, Svein Arne; Løvstakken, Lasse; Torp, Hans. (2017) 3D myocardial mechanical wave measurements using high frame rate ultrasound imaging and Clutter filter wave imaging: Towards a 3D myocardial elasticity mapping. Proceedings - IEEE Ultrasonics Symposium.
Summary/Abstract
Santos, Pedro; Løvstakken, Lasse; Samset, Eigil; D'Hooge, Jan. (2017) Volumetric imaging of fast mechanical waves in the heart using a clinical ultrasound system. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Smistad, Erik; Østvik, Andreas; Haugen, Bjørn Olav; Løvstakken, Lasse. (2017) 2D left ventricle segmentation using deep learning. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Wigen, Morten Smedsrud; Rodriguez-Molares, Alfonso; Bjåstad, Tore Grüner; Eriksen, Marius; STENSÆTH, KNUT HAAKON; Løvstakken, Lasse. (2017) In-vivo 3D cardiac vector flow imaging - A comparison between ultrasound and phase-contrast MRI. Proceedings - IEEE Ultrasonics Symposium.
Summary/Abstract
Østvik, Andreas; Smistad, Erik; Aase, Svein Arne; Haugen, Bjørn Olav; Løvstakken, Lasse. (2017) Real-time classification of standard cardiac views in echocardiography using neural networks. Proceedings - IEEE Ultrasonics Symposium.
Summary/Abstract

2016

Avdal, Jørgen; Ekroll, Ingvild Kinn; Løvstakken, Lasse; Torp, Hans. (2016) Combined 2-D vector and tracking Doppler imaging for improved blood velocity quantification. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Ekroll, Ingvild Kinn; Avdal, Jørgen; Swillens, Abigail Emily; Torp, Hans; Løvstakken, Lasse. (2016) An Extended Least Squares Method for Aliasing-Resistant Vector Velocity Estimation. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 63 (11).
Academic article
Fadnes, Solveig; Nyrnes, Siri Ann; Wigen, Morten Smedsrud; Tegnander, Eva; Løvstakken, Lasse. (2016) Detailed flow visualization in fetal and neonatal hearts using 2-D speckle tracking. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Grønli, Thomas; Smistad, Erik; Nyrnes, Siri Ann; Gomez, Alberto; Løvstakken, Lasse. (2016) Reconstruction of In Vivo Flow Velocity Fields Based On a Rapid Ultrasound Image Segmentation and B-spline Regularization Framework. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Høgenes, Jakob; Wigen, Morten Smedsrud; Nyrnes, Siri Ann; Segers, P.; Swillens, Abigail; Løvstakken, Lasse. (2016) Model-based estimation of intra-cardiac blood flow velocities using an unscented Kalman filter. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Karabiyik, Yucel; Avdal, Jørgen; Ekroll, Ingvild Kinn; Torp, Hans; Løvstakken, Lasse. (2016) Data adaptive 2-D tracking Doppler. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Karabiyik, Yucel; Ekroll, Ingvild Kinn; Eik-Nes, Sturla; Avdal, Jørgen; Løvstakken, Lasse. (2016) Adaptive Spectral Estimation Methods in Color Flow Imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 63 (11).
Academic article
Rimehaug, Audun Eskeland; Skogvoll, Eirik; Aadahl, Petter; Lyng, Oddveig; Nordhaug, Dag Ole; Løvstakken, Lasse; Kirkeby-Garstad, Idar. (2016) Minimally invasive beat-by-beat monitoring of cardiac power in normal hearts and during acute ventricular dysfunction. Physiological Reports. volum 4:e12989 (19).
Academic article
Rodriguez-Molares, Alfonso; Avdal, Jørgen; Torp, Hans; Løvstakken, Lasse. (2016) Axial lobes in coherent plane-wave compounding. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Rodriguez-Molares, Alfonso; Fatemi, Seyed Ali Mohammad; Torp, Hans; Løvstakken, Lasse. (2016) Adaptive beamforming based on Snell's law of reflection. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Santos, Pedro; Haugen, Geir Ultveit; Løvstakken, Lasse; Samset, Eigil; D'Hooge, Jan. (2016) High frame rate 3D tissue velocity imaging using sub-aperture beamforming: A pilot study in vivo. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Santos, Pedro; Haugen, Geir Ultveit; Løvstakken, Lasse; Samset, Eigil; D'hooge, Jan R M. (2016) Diverging Wave Volumetric Imaging Using Subaperture Beamforming. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 63 (12).
Academic article
Smistad, Erik; Løvstakken, Lasse. (2016) Vessel detection in ultrasound images using deep convolutional neural networks. Lecture Notes in Computer Science (LNCS). volum 10008 LNCS.
Academic article
Van Cauwenberge, Joris; Løvstakken, Lasse; Fadnes, Solveig; Rodriguez-Molares, Alfonso; Vierendeels, Jan; Segers, Patrick; Swillens, Abigail. (2016) Assessing the Performance of Ultrafast Vector Flow Imaging in the Neonatal Heart via Multiphysics Modeling and in Vitro Experiments. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 63 (11).
Academic article
Wigen, Morten Smedsrud; Løvstakken, Lasse. (2016) In vivo three-dimensional intra-cardiac vector flow imaging using a 2D matrix array transducer. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article

2015

Avdal, Jørgen; Løvstakken, Lasse; Torp, Hans. (2015) Effects of reverberations and clutter filtering in pulsed Doppler using sparse sequences. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (5).
Academic article
Ekroll, Ingvild Kinn; Voormolen, Marco Marien; Standal, Øyvind Krøvel-Velle; Rau, Jochen; Løvstakken, Lasse. (2015) Coherent compounding in doppler imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (9).
Academic article
Fadnes, Solveig; Bjærum, Steinar; Torp, Hans; Løvstakken, Lasse. (2015) Clutter filtering influence on blood velocity estimation using speckle tracking. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (12).
Academic article
Fadnes, Solveig; Ekroll, Ingvild Kinn; Nyrnes, Siri Ann; Torp, Hans; Løvstakken, Lasse. (2015) Robust angle-independent blood velocity estimation based on dual-angle plane wave imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (10).
Academic article
Iversen, Daniel Høyer; Lindseth, Frank; Unsgård, Geirmund; Torp, Hans; Løvstakken, Lasse. (2015) Improved quality of freehand 3-D ultrasound color flow imaging by multi-angle compounding. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Nyrnes, Siri Ann; Løvstakken, Lasse. (2015) Flow speckle tracking provides new information of complex blood flow in congenital heart disease. Cardiology in the Young. volum 25.
Summary/Abstract
Rodriguez-Molares, Alfonso; Løvstakken, Lasse; Ekroll, Ingvild Kinn; Torp, Hans. (2015) Needle detection by image source localization. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Rodriguez-Molares, Alfonso; Løvstakken, Lasse; Ekroll, Ingvild Kinn; Torp, Hans. (2015) Reconstruction of specular reflectors by iterative image source localization. Journal of the Acoustical Society of America. volum 138 (3).
Academic article
Rodriguez-Molares, Alfonso; Løvstakken, Lasse; Torp, Hans; Martin-Herrero, Julio; Bjåstad, Tore Grüner. (2015) Detection of the Intima-Lumen interface by coherent combination of RF scanlines. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Rodriguez-Molares, Alfonso; Torp, Hans; Denarie, Bastien; Løvstakken, Lasse. (2015) The angular apodization in coherent plane-wave compounding. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (11).
Academic article
Santos, Pedro; Tong, Ling; Ortega, Alejandra; Løvstakken, Lasse; Samset, Eigil; D'hooge, Jan R M. (2015) Acoustic output of multi-line transmit beamforming for fast cardiac imaging: A simulation study. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (7).
Academic article
Torp, Hans; Rodriguez-Molares, Alfonso; Løvstakken, Lasse. (2015) Optimum beamformer strategy for detecting signals in clutter noise. Proceedings - IEEE Ultrasonics Symposium.
Academic article

2014

Angelelli, Paolo; Snare, Sten Roar; Nyrnes, Siri Ann; Bruckner, Stefan; Hauser, Helwig; Løvstakken, Lasse. (2014) Live ultrasound-based particle visualization of blood flow in the heart. Spring conference on Computer graphics.
Academic article
Avdal, Jørgen; Ekroll, Ingvild Kinn; Fadnes, Solveig; Løvstakken, Lasse; Torp, Hans. (2014) 2D tracking doppler for cardiac jet flow velocity estimation. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Ekroll, Ingvild Kinn; Dahl, Torbjørn; Torp, Hans; Løvstakken, Lasse. (2014) Combined vector velocity and spectral doppler imaging for improved imaging of complex blood flow in the carotid arteries. Ultrasound in Medicine and Biology. volum 40 (7).
Academic article
Ekroll, Ingvild Kinn; Voormolen, Marco Marien; Standal, Øyvind Krøvel-Velle; Rau, Jochen; Løvstakken, Lasse. (2014) On the accuracy of coherent compounding Doppler imaging. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Fadnes, Solveig; Ekroll, Ingvild Kinn; Nyrnes, Siri Ann; Torp, Hans; Løvstakken, Lasse. (2014) Robust angle-independent blood velocity estimation based on multi-angle speckle tracking and vector Doppler. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Fadnes, Solveig; Nyrnes, Siri Ann; Torp, Hans; Løvstakken, Lasse. (2014) Shunt flow evaluation in congenital heart disease based on two-dimensional speckle tracking. Ultrasound in Medicine and Biology. volum 40 (10).
Academic article
Fredriksen, Tonje Dobrowen; Avdal, Jørgen; Ekroll, Ingvild Kinn; Dahl, Torbjørn; Løvstakken, Lasse; Torp, Hans. (2014) Investigations of spectral resolution and angle dependency in a 2-D tracking doppler method. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 61 (7).
Academic article
Johnsen, Ingvild Bjellmo; Løvstakken, Lasse; Åsvold, Bjørn Olav; Høydal, Morten; Sætrom, Pål; Bonnevie, Tora. (2014) NTNUs stjerneforskere. Adresseavisen.
publications.INTERVJUSKRIFTL
Kiss, Gabriel; Iversen, Daniel Høyer; Standal, Øyvind Krøvel-Velle; Rau, Jochen; Torp, Hans; Løvstakken, Lasse; Måsøy, Svein-Erik. (2014) A visualization tool for improved assessment and follow-up with ultrasound. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Løvstakken, Lasse. (2014) 3D ultralydbilder av blodstrøm kan gi bedre forståelse av hjertesykdom.
Web pages (information material)
Nyrnes, Siri Ann; Løvstakken, Lasse; Døhlen, Gaute; Skogvoll, Eirik; Torp, Hans; Skjærpe, Terje; Norgård, Gunnar; Samstad, Stein; Graven, Torbjørn; Haugen, Bjørn Olav. (2014) Blood Flow Imaging in Transesophageal Echocardiography during Atrial Septal Defect Closure: A Comparison with the Current References. Echocardiography. volum 32 (1).
Academic article
Santos, Pedro; Tong, Ling; Ortega, Alejandra; Løvstakken, Lasse; Samset, Eigil; D'hooge, Jan R M. (2014) Safety of Multi-Line Transmit beam forming for fast cardiac imaging - A simulation study. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Swillens, Abigail; Shcherbakova, Darya; Trachet, Bram; Segers, Patrick; Ekroll, Ingvild Kinn; Løvstakken, Lasse. (2014) A multi-angle plane wave imaging approach for high frequency 2D flow visualization in small animals: Simulation study in the murine arterial system. IEEE International Ultrasonics Symposium Proceedings.
Academic article

2013

Denarie, Bastien; Tangen, Thor Andreas; Ekroll, Ingvild Kinn; Rolim, Natale Pinheiro Lage; Torp, Hans; Bjåstad, Tore; Løvstakken, Lasse. (2013) Coherent Plane Wave Compounding for Very High Frame Rate Ultrasonography of Rapidly Moving Targets. IEEE Transactions on Medical Imaging. volum 32 (7).
Academic article
Ekroll, Ingvild Kinn; Swillens, Abigail; Segers, Patrick; Dahl, Torbjørn; Torp, Hans; Løvstakken, Lasse. (2013) Simultaneous Quantification of Flow and Tissue Velocities Based on Multi-Angle Plane Wave Imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 60 (4).
Academic article
Fredriksen, Tonje Dobrowen; Ekroll, Ingvild Kinn; Løvstakken, Lasse; Torp, Hans. (2013) 2-D Tracking Doppler: A New Method to Limit Spectral Broadening in Pulsed Wave Doppler. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 60 (9).
Academic article
Iversen, Daniel Høyer; Lindseth, Frank; Unsgård, Geirmund; Torp, Hans; Løvstakken, Lasse. (2013) Model-Based Correction of Velocity Measurements in Navigated 3-D Ultrasound Imaging During Neurosurgical Interventions. IEEE Transactions on Medical Imaging. volum 32 (9).
Academic article
Nyrnes, Siri Ann; Løvstakken, Lasse; Døhlen, Gaute; Skogvoll, Eirik; Torp, Hans; Skjærpe, Terje; Norgård, Gunnar; Samstad, Stein; Graven, Torbjørn; Haugen, Bjørn Olav. (2013) Transesophageal echocardiography with Blood Flow Imaging during Atrial Septal defect closure: A comparison with the current references. Cardiology in the Young. volum 23.
Summary/Abstract
Rimehaug, Audun Eskeland; Lyng, Oddveig; Nordhaug, Dag Ole; Løvstakken, Lasse; Aadahl, Petter; Kirkeby-Garstad, Idar. (2013) Cardiac power integral: a new method for monitoring cardiovascular performance. Physiological Reports. volum 1 (6).
Academic article
Van Canneyt, K.; Swillens, Abigail; Løvstakken, Lasse; Antiga, L; Verdonck, P.; Segers, Patrick. (2013) The accuracy of ultrasound volume flow measurements in the complex flow setting of a forearm vascular access. Journal of Vascular Access. volum 14 (3).
Academic article

2012

Ekroll, Ingvild Kinn; Dahl, Torbjørn; Torp, Hans; Løvstakken, Lasse. (2012) In vivo Vector Flow Imaing With Retrospective Pulsed Wave Doppler. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Ekroll, Ingvild Kinn; Torp, Hans; Løvstakken, Lasse. (2012) Spectral Doppler Estimation Utilizing 2-D Spatial Information and Adaptive Signal Processing. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 59 (6).
Academic article
Fadnes, Solveig; Nyrnes, Siri Ann; Swillens, Abigail; Torp, Hans; Løvstakken, Lasse. (2012) Shunt quantification in congenital heart disease based on two-dimensional speckle tracking. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Fredriksen, Tonje Dobrowen; Ekroll, Ingvild Kinn; Løvstakken, Lasse; Torp, Hans. (2012) 2D Tracking Doppler: A New Method to Limit Spectral Broadening in Pulsed Wave Doppler. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Iversen, Daniel Høyer; Lindseth, Frank; Torp, Hans; Løvstakken, Lasse. (2012) Improved 3-D reconstruction of vascular flow based on plane wave imaging. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Iversen, Daniel Høyer; Lindseth, Frank; Torp, Hans; Løvstakken, Lasse. (2012) Model-based correction of angle-dependencies in navigated 3-D flow imaging during neurosurgical interventions. IEEE International Ultrasonics Symposium Proceedings.
Summary/Abstract
Løvstakken, Lasse; Nyrnes, Siri Ann; Haugen, Bjørn Olav; Torp, Hans. (2012) Angle-independent quantification of complex flow patterns in congenital heart disease. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Nyrnes, Siri Ann; Løvstakken, Lasse. (2012) Raskere og sikrere diagnose. Hjertebarnet.
Article
Swillens, Abigail Emily; De Santis, G.; Degroote, Joris; Løvstakken, Lasse; Vierendeels, Jan; Segers, Patrick. (2012) Accuracy of carotid strain estimates from ultrasonic wall tracking: a study based on multiphysics simulations and in vivo data. IEEE Transactions on Medical Imaging. volum 31 (1).
Academic article
Swillens, Abigail; De Witte, Marloes; Nordgaard, Håvard B.; Løvstakken, Lasse; Van Loo, D.; Trachet, Bram; Vierendeels, Jan; Segers, Patrick. (2012) Effect of the degree of LAD stenosis on "competitive flow" and flow field characteristics in LIMA-to-LAD bypass surgery. Medical and Biological Engineering and Computing. volum 50 (8).
Academic article

2011

Alnes, Solveig Søvik; Swillens, Abigail; Segers, Patrick; Torp, Hans; Løvstakken, Lasse. (2011) Clutter filtering issues in speckle tracking for two-dimensional blood velocity estimation - a potential solution based on compounded imaging. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Iversen, Daniel Høyer; Lindseth, Frank; Unsgård, Geirmund; Torp, Hans; Løvstakken, Lasse. (2011) Model-based correction of angle-dependencies in navigated3-D flow imaging during neurosurgical interventions. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2011) Change in left ventricular vortex flow before and after surgery for coarctation of the aorta in an infant shown with plane wave imaging and flow speckle tracking. Cardiology in the Young. volum 21.
Summary/Abstract
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2011) Flow speckle tracking for detailed visualization of flow patterns in neonates with congenital heart defects. European Heart Journal-Cardiovascular Imaging.
Summary/Abstract
Swillens, Abigail Emily; De Santis, G.; Degroote, Joris; Løvstakken, Lasse; Vierendeels, Jan; Segers, Patrick. (2011) Multiphysics modeling in support of ultrasonic image development: integration of fluid-structure interaction simulations and Field II applied to the carotid artery. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Swillens, Abigail Emily; De Santis, G.; Degroote, Joris; Løvstakken, Lasse; Vierendeels, Jan; Segers, Patrick. (2011) Strain estimation in the carotid artery from ultrasonic wall tracking: a multiphysics model study. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Swillens, Abigail Emily; Segers, Patrick; De Groote, Joris; Vierendeels, Jan; Løvstakken, Lasse. (2011) Improving ultrasonic imaging of the vascular wall and blood flow using a multiphysics simulation tool integrating fluid-structure interaction and ultrasound simulations. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Swillens, Abigail Emily; Segers, Patrick; Løvstakken, Lasse. (2011) A combined speckle tracking and phase-shift estimation approach for 2D blood flow imaging in the carotid bifurcation. IEEE International Ultrasonics Symposium Proceedings.
Academic article

2010

Ekroll, Ingvild Kinn; Torp, Hans; Løvstakken, Lasse. (2010) Retrospective PW-Doppler based on spatiotemporal adaptive signal processing. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Hergum, Torbjørn; Bjåstad, Tore Grüner; Løvstakken, Lasse; Kristoffersen, Kjell; Torp, Hans. (2010) Reducing Color Flow Artifacts caused by Parallel Beamforming. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 57 (4).
Academic article
Løvstakken, Lasse; Torp, Hans. (2010) Extended Velocity Range in Color Flow Imaging using Parallel Receive Beamforming. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Nordgaard, Håvard B.; Swillens, Abigail; Nordhaug, Dag Ole; Kirkeby-Garstad, Idar; Van Loo, D.; Vitale, Nicola; Segers, Patrick; Haaverstad, Rune; Løvstakken, Lasse. (2010) Impact of competitive flow on wall shear stress in coronary surgery: computational fluid dynamics of a LIMA-LAD model. Cardiovascular Research (CVR). volum 88 (3).
Academic article
Nyrnes, Siri Ann; Løvstakken, Lasse; Skogvoll, Eirik; Torp, Hans; Haugen, Bjørn Olav. (2010) Does a new ultrasound flow modality improve visualization of neonatal pulmonary veins?. Hjerteforum. volum 23 (1).
Summary/Abstract
Nyrnes, Siri Ann; Løvstakken, Lasse; Skogvoll, Eirik; Torp, Hans; Haugen, Bjørn Olav. (2010) Does a new ultrasound flow modality improve visualization of neonatal pulmonary veins?. Echocardiography. volum 27 (9).
Academic article
Solheim, Ole; Selbekk, Tormod; Løvstakken, Lasse; Tangen, Geir Arne; Solberg, Ole Vegard; Johansen, Tonni Franke; Cappelen, Johan; Unsgård, Geirmund. (2010) Intrasellar ultrasound in transsphenoidal surgery: a novel technique. Neurosurgery. volum 66 (1).
Academic article
Swillens, Abigail Emily; Degroote, J.; Vierendeels, Jan; Løvstakken, Lasse; Segers, Patrick. (2010) A simulation environment for validating ultrasonic blood flow and vessel wall imaging based on fluid-structure interaction simulations: ultrasonic assessment of arterial distension and wall shear rate. Medical Physics (Lancaster). volum 37 (8).
Academic article
Swillens, Abigail Emily; Segers, Patrick; Løvstakken, Lasse. (2010) Two-dimensional flow imaging in the carotid bifurcation using a combined speckle tracking and phase-shift estimator: a study based on ultrasound simulations and in vivo analysis. Ultrasound in Medicine and Biology. volum 36 (10).
Academic article
Swillens, Abigail Emily; Segers, Patrick; Torp, Hans; Løvstakken, Lasse. (2010) Two-dimensional blood velocity estimation with ultrasound: speckle tracking versus crossed-beam vector Doppler based on flow simulations in a carotid bifurcation model. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 57 (2).
Academic article
Yu, Alfred C. H.; Løvstakken, Lasse. (2010) Eigen-Based Clutter Filter Design for Ultrasound Color Flow Imaging: A Review. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 57 (5).
Academic article

2009

Lindseth, Frank; Løvstakken, Lasse; Rygh, Ola Morten; Tangen, Geir Arne; Torp, Hans; Unsgaard, Geirmund. (2009) Blood Flow Imaging: An Angle-Independent Ultrasound Modality for Intraoperative Assessment of Flow Dynamics in Neurovascular Surgery. Neurosurgery. volum 65 (6).
Academic article
Frijlink, Martijn Egbert; Løvstakken, Lasse; Torp, Hans. (2009) Investigation of transmit and receive performance at the fundamental and third harmonic resonance frequency of a medical ultrasound transducer. Ultrasonics. volum 49 (8).
Academic article
Løvstakken, Lasse; Møllerløkken, Andreas; Måsøy, Svein-Erik. (2009) Current trends in ultrasound imaging technology, SURF imaging, and decompression induced microbubbles. The future of diving: 100 years of haldane and beyond.
Academic chapter/article
Nordgaard, Håvard; Nordhaug, Dag; Kirkeby-Garstad, Idar; Løvstakken, Lasse; Vitale, Nicola; Haaverstad, Rune. (2009) Different graft flow patterns due to competitive flow or stenosis in the coronary anastomosis assessed by transit-time flowmetry in a porcine model. European Journal of Cardio-Thoracic Surgery. volum 36 (1).
Academic article
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans. (2009) Plane wave imaging for high frame rate flow visualisation in neonates with congenital heart disease. European Heart Journal-Cardiovascular Imaging. volum 10.
Summary/Abstract
Swillens, A; De Schryver, T; Løvstakken, Lasse; Torp, Hans; Segers, P. (2009) Assessment of Numerical Simulation Strategies for Ultrasonic Color Blood Flow Imaging, Based on a Computer and Experimental Model of the Carotid Artery. Annals of Biomedical Engineering. volum 37 (11).
Academic article
Swillens, A; Løvstakken, Lasse; Kips, J; Torp, Hans; Segers, P. (2009) Ultrasound Simulation of Complex Flow Velocity Fields Based on Computational Fluid Dynamics. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 56 (3).
Academic article
Swillens, Abigail; Segers, Patrick; Torp, Hans; Løvstakken, Lasse. (2009) Two-dimensional flow velocity estimation in the carotid bifurcation: a study of crossed-beam vector Doppler and speckle tracking using computational fluid dynamics. IEEE International Ultrasonics Symposium Proceedings.
Academic article

2008

Frijlink, Martijn Egbert; Løvstakken, Lasse; Torp, Hans. (2008) Fundamental and Third Harmonic Operation of a Medical Phased Array Transducer. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Løvstakken, Lasse; Ibrahim, Khalid Shaker Oklah; Vitale, Nicola; Henriksen, Siren T.; Kirkeby-Garstad, Idar; Torp, Hans; Haaverstad, Rune. (2008) Blood Flow Imaging: A New Two-dimensional Ultrasound Modality for Enhanced Intraoperative Visualization of Blood Flow Patterns in Coronary Anastomoses. Journal of the American Society of Echocardiography. volum 21 (8).
Academic article
Nyrnes, Siri Ann; Løvstakken, Lasse. (2008) Ny norsk ultralyd. ComputerWorld Norge.
publications.INTERVJUSKRIFTL
Nyrnes, Siri Ann; Løvstakken, Lasse. (2008) Ny ultralydmetode gir bedre blodstrømsbilder. Dagens medisin.
Article
Nyrnes, Siri Ann; Løvstakken, Lasse. (2008) Ny ultralydmetode hjelper barn. VG : Verdens gang.
publications.INTERVJUSKRIFTL
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2008) The coronary arteries visualised by a new ultrasound flow modality. European Heart Journal-Cardiovascular Imaging. volum 9.
Summary/Abstract
Oddershede, Niels; Løvstakken, Lasse; Torp, Hans; Jensen, Jørgen A.. (2008) Estimating 2-D vector velocities using multidimensional spectrum analysis. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 55 (8).
Academic article
Swillens, Abigail; Løvstakken, Lasse; Torp, Hans; Segers, Patrick. (2008) A comparison of multidimensional flow estimation techniques using computational fluid dynamics: speckle tracking versus vector Doppler. IEEE International Ultrasonics Symposium Proceedings.
Academic article

2007

Khalid, Ibrahim; Løvstakken, Lasse; Kirkeby-Garstad, Idar; Torp, Hans; Vik-Mo, Harald; Haaverstad, Rune. (2007) Effect of the Cardiac Cycle on the Coronary Anastomosis Assessed by Ultrasound. Asian Cardiovascular and Thoracic Annals. volum 15 (2).
Academic article
Løvstakken, Lasse. (2007) Signal processing in diagnostic ultrasound: Algorithms for real-time estimation and visualization of blood flow velocity. 2007. ISBN 978-82-471-0525-2.
PhD thesis
Løvstakken, Lasse; Bjærum, Steinar; Torp, Hans. (2007) Optimal velocity estimation in ultrasound Color Flow Imaging in presence of clutter. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 54 (3).
Academic article
Løvstakken, Lasse; Orderud, Fredrik; Torp, Hans. (2007) Real-time Indication of Acoustic Window for Phased-Array Transducers in Ultrasound Imaging. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Løvstakken, Lasse; Yu, Alfred C. H.; Torp, Hans. (2007) P6B-3 In Vivo Investigation of Filter order Influence in Eigen-based Clutter Filtering for Color Flow Imaging. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2007) A new ultrasound modality to visualise atrial septal defect flow in children. European Heart Journal-Cardiovascular Imaging. volum 8.
Summary/Abstract
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2007) Blood Flow Imaging - A New Angle-Independent Ultrasound Modality for the Visualization of Flow in Atrial Septal Defects in Children. Echocardiography. volum 24 (9).
Academic article
Oddershede, Niels; Løvstakken, Lasse; Torp, Hans; Jensen, Jørgen A.. (2007) Multi-dimensional spectrum analysis for 2-D vector velocity estimation. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Yu, Alfred C. H.; Løvstakken, Lasse. (2007) Eigen-Based Clutter Filters for Color Flow Imaging: Single-Ensemble vs. Multi-Ensemble Approaches. IEEE International Ultrasonics Symposium Proceedings.
Academic article

2006

Løvstakken, Lasse; Bjærum, Steinar; Kristoffersen, K; Haaverstad, Rune; Torp, Hans. (2006) Real-time adaptive clutter rejection filtering in color flow imaging using power method iterations. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 53.
Academic article
Løvstakken, Lasse; Bjærum, Steinar; Martens, Ditlef; Torp, Hans. (2006) Blood flow imaging - A new real-time, 2-D flow imaging technique. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 53 (2).
Academic article
Løvstakken, Lasse; Tangen, Thor Andreas; Bjærum, Steinar; Torp, Hans. (2006) Optimal velocity estimation in ultrasound Color Flow Imaging in presence of clutter noise. IEEE International Ultrasonics Symposium Proceedings.
Academic article

Scientific articles

Sørensen, Kristian; Fadnes, Solveig; Mertens, Luc; Henry, Matthew; Segers, Patrick; Løvstakken, Lasse; Nyrnes, Siri Ann. (2023) Assessment of early Diastolic Intraventricular Pressure Difference in Children by Blood Speckle Tracking Echocardiography. Journal of the American Society of Echocardiography.
Academic article
Hjorth-Hansen, Anna Katarina; Magelssen, Malgorzata Isabela; Andersen, Garrett Newton; Graven, Torbjørn; Kleinau, Jens Olaf; Landstad, Bodil; Løvstakken, Lasse; Skjetne, Kyrre; Mjølstad, Ole Christian; Dalen, Håvard. (2022) User experience and image quality influence on performance of automated real-time quantification of left ventricular function by handheld ultrasound devices: a diagnostic accuracy study with data from general practitioners, nurses and cardiologists. Open heart. volum 9 (2).
Academic article
Hjorth-Hansen, Anna; Magelssen, Malgorzata Isabela; Andersen, Garrett Newton; Graven, Torbjørn; Kleinau, Jens Olaf; Landstad, Bodil; Løvstakken, Lasse; Skjetne, Kyrre; Mjølstad, Ole Christian; Dalen, Håvard. (2022) Real-time automatic quantification of left ventricular function by hand-held ultrasound devices in patients with suspected heart failure: a feasibility study of a diagnostic test with data from general practitioners, nurses and cardiologists. BMJ Open. volum 12 (10).
Academic article
Leinan, Paul Roger; Grønli, Thomas; Skjetne, Paal; Wigen, Morten Smedsrud; Urheim, Stig; Løvstakken, Lasse; Dahl, Sigrid Kaarstad. (2022) Comparison of ultrasound vector flow imaging and CFD simulations with PIV measurements of flow in a left ventricular outflow trackt phantom - Implications for clinical use and in silico studies. Computers in Biology and Medicine. volum 146.
Academic article
Mawad, Wadi; Fadnes, Solveig; Løvstakken, Lasse; Henry, Matthew; Mertens, Luc; Nyrnes, Siri Ann. (2022) Pulmonary Hypertension in Children is associated with Abnormal Flow patterns in the Main Pulmonary Artery as demonstrated by Blood Speckle Tracking. CJC Pediatric and Congenital Heart Disease RSS Published By: Elsevier. volum 1 (5).
Academic article
Pasdeloup, David Francis Pierre; Olaisen, Sindre Hellum; Østvik, Andreas; Sæbø, Sigbjørn; Pettersen, Håkon Neergaard; Holte, Espen; Grenne, Bjørnar; Stølen, Stian Bergseng; Smistad, Erik; Aase, Svein Arne; Dalen, Håvard; Løvstakken, Lasse. (2022) Real-Time Echocardiography Guidance for Optimized Apical Standard Views. Ultrasound in Medicine and Biology. volum 49 (1).
Academic article
Smistad, Erik; Dalen, Håvard; Grenne, Bjørnar; Løvstakken, Lasse. (2022) Segmentation of parasternal long axis views using deep learning. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Smistad, Erik; Østvik, Andreas; Grue, Jahn Frederik; Dalen, Håvard; Løvstakken, Lasse. (2022) Tracking-based mitral annular plane systolic excursion (MAPSE) measurement using deep learning in B-mode ultrasound. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Wifstad, Sigurd Vangen; Løvstakken, Lasse; Avdal, Jørgen; Berg, Erik Andreas Rye; Torp, Hans; Grenne, Bjørnar; Fiorentini, Stefano. (2022) Quantifying Valve Regurgitation Using 3-D Doppler Ultrasound Images and Deep Learning. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 69 (12).
Academic article
Daae, Annichen Søyland; Wigen, Morten Smedsrud; Fadnes, Solveig; Løvstakken, Lasse; Støylen, Asbjørn. (2021) Intraventricular Vector Flow Imaging with Blood Speckle Tracking in Adults: Feasibility, Normal Physiology and Mechanisms in Healthy Volunteers. Ultrasound in Medicine and Biology. volum 47 (12).
Academic article
Mawad, Wadi; Løvstakken, Lasse; Fadnes, Solveig; Grønli, Thomas; Segers, Patrick; Mertens, Luc; Nyrnes, Siri Ann. (2021) Right Ventricular Flow Dynamics in Dilated Right Ventricles: Energy Loss Estimation Based on Blood Speckle Tracking Echocardiography-A Pilot Study in Children. Ultrasound in Medicine and Biology. volum 47 (6).
Academic article
Salte, Ivar M.; Østvik, Andreas; Smistad, Erik; Melichova, Daniela; Nguyen, Thuy Mi; Karlsen, Sigve; Brunvand, Harald; Haugaa, Kristina H.; Edvardsen, Thor; Løvstakken, Lasse; Grenne, Bjørnar. (2021) Artificial Intelligence for Automatic Measurement of Left Ventricular Strain in Echocardiography. JACC Cardiovascular Imaging. volum 14 (10).
Academic article
Smistad, Erik; Ãstvik, Andreas; LÃ¸vstakken, Lasse. (2021) Annotation Web - An open-source web-based annotation tool for ultrasound images. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Smistad, Erik; Salte, Ivar Mjåland; Dalen, Håvard; Lovstakken, Lasse. (2021) Real-time temporal coherent left ventricle segmentation using convolutional LSTMs. Proceedings - IEEE Ultrasonics Symposium.
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Smistad, Erik; Steinsland, Erik Nikolai; LÃ¸vstakken, Lasse. (2021) Real-time 3D left ventricle segmentation and ejection fraction using deep learning. Proceedings - IEEE Ultrasonics Symposium.
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Viggen, Erlend Magnus; Løvstakken, Lasse; Måsøy, Svein-Erik; Merciu, Ioan Alexandru. (2021) Better Automatic Interpretation of Cement Evaluation Logs through Feature Engineering. SPE Journal. volum 26 (5).
Academic article
Østvik, Andreas; Salte, Ivar Mjåland; Smistad, Erik; Nguyen, Thuy Mi; Melichova, Daniela; Brunvand, Harald; Haugaa, Kristina; Edvardsen, Thor; Grenne, Bjørnar; Løvstakken, Lasse. (2021) Myocardial Function Imaging in Echocardiography Using Deep Learning. IEEE Transactions on Medical Imaging. volum 40 (5).
Academic article
Fadnes, Solveig; Sørensen, Kristian; Nyrnes, Siri Ann; Wigen, Morten Smedsrud; Løvstakken, Lasse. (2020) Intraventricular Pressure Gradients - Vector Flow Imaging versus Color M-Mode. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Golfetto, Cristiana; Ekroll, Ingvild Kinn; Torp, Hans; Løvstakken, Lasse; Avdal, Jørgen. (2020) Retrospective Transmit beamforming and Coherent Plane-Wave Compounding for Microvascular Doppler Imaging: A Comparison Study. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.
Academic article
Leclerc, Sarah; Smistad, Erik; Østvik, Andreas; Cervenansky, Frederic; Espinosa, Florian; Espeland, Torvald; Berg, Erik Andreas Rye; Belhamissi, Mourad; Israilov, Sardor; Grenier, Thomas; Lartizien, Carole; Jodoin, Pierre-Marc; Løvstakken, Lasse; Bernard, Olivier. (2020) LU-Net: A Multistage Attention Network to Improve the Robustness of Segmentation of Left Ventricular Structures in 2-D Echocardiography. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 67 (12).
Academic article
Nyrnes, Siri Ann; Fadnes, Solveig; Wigen, Morten Smedsrud; Mertens, Luc; Løvstakken, Lasse. (2020) Blood Speckle-Tracking Based on High–Frame Rate Ultrasound Imaging in Pediatric Cardiology. Journal of the American Society of Echocardiography. volum 33 (4).
Academic article
Perrot, Vincent; Ekroll, Ingvild Kinn; Avdal, Jørgen; Saxhaug, Lars Mølgaard; Dalen, Håvard; Vray, Didier; Løvstakken, Lasse; Liebgott, Herve. (2020) Translation of Simultaneous Vessel Wall Motion and Vectorial Blood Flow Imaging in Healthy and Diseased Carotids to the Clinic: A pilot study. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.
Academic article
Ramalli, Alessandro; Rodriguez-Molares, Alfonso; Avdal, Jørgen; D'Hooge, Jan R M; Løvstakken, Lasse. (2020) High-Frame-Rate Color Doppler Echocardiography: A Quantitative Comparison of Different Approaches. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 67 (5).
Academic article
Salles, Sebastien; Espeland, Torvald; Rodriguez-Molares, Alfonso; Aase, Svein Arne; Hammer, Tommy; Støylen, Asbjørn; Aakhus, Svend; Løvstakken, Lasse; Torp, Hans. (2020) 3D Myocardial Mechanical Wave Measurements: Toward In Vivo 3D Myocardial Elasticity Mapping. JACC Cardiovascular Imaging. volum 14 (8).
Academic article
Salles, Sebastien; Kvåle, Kaja Frøysaa; Lervik, Lars Christian Naterstad; Støylen, Asbjørn; Løvstakken, Lasse; Samset, Eigil; Torp, Hans. (2020) Detection of Tissue Fibrosis using Natural Mechanical Wave Velocity Estimation: Feasibility Study. Ultrasound in Medicine and Biology. volum 46 (9).
Academic article
Smistad, Erik; Østvik, Andreas; Salte, Ivar Mjåland; Melichova, Daniela; Nguyen, Thuy Mi; Haugaa, Kristina; Brunvand, Harald; Edvardsen, Thor; Leclerc, Sarah; Bernard, Olivier; Grenne, Bjørnar; Løvstakken, Lasse. (2020) Real-Time Automatic Ejection Fraction and Foreshortening Detection Using Deep Learning. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 67 (12).
Academic article
Viggen, Erlend Magnus; Merciu, Ioan Alexandru; Løvstakken, Lasse; Måsøy, Svein-Erik. (2020) Automatic interpretation of cement evaluation logs from cased boreholes using supervised deep neural networks. Journal of Petroleum Science and Engineering. volum 195.
Academic article
Karabiyik, Yücel; Avdal, Jørgen; Ekroll, Ingvild Kinn; Fiorentini, Stefano; Torp, Hans; Løvstakken, Lasse. (2019) Data Adaptive 2-D Tracking Doppler for High-Resolution Spectral Estimation. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 67 (1).
Academic article
Leclerc, Sarah; Smistad, Erik; Grenier, Thomas; Lartizien, Carole; Østvik, Andreas; Cervenansky, Frederic; Espinosa, Florian; Espeland, Torvald; Berg, Erik Andreas Rye; Jodoin, Pierre-Marc; Løvstakken, Lasse; Bernard, Olivier. (2019) RU-Net: A refining segmentation network for 2D echocardiography. Proceedings - IEEE Ultrasonics Symposium. volum 2019-October.
Academic article
Leclerc, Sarah; Smistad, Erik; Pedrosa, Joao; Østvik, Andreas; Cervenansky, Frederic; Espinosa, Florian; Espeland, Torvald; Berg, Erik Andreas Rye; Jodoin, Pierre-Marc; Grenier, Thomas; Lartizien, Carole; D'Hooge, Jan R M; Løvstakken, Lasse; Bernard, Olivier. (2019) Deep Learning for Segmentation using an Open Large-Scale Dataset in 2D Echocardiography. IEEE Transactions on Medical Imaging. volum 38 (9).
Academic article
Ramalli, Alessandro; D'Hooge, Jan; Løvstakken, Lasse; Tortoli, Piero. (2019) A Direct Measurement of Inter-Element Cross-Talk in Ultrasound Arrays. Proceedings - IEEE Ultrasonics Symposium. volum 2019-October.
Academic article
Ramalli, Alessandro; Rodriguez-Molares, Alfonso; Avdal, Jørgen; D'Hooge, Jan; Løvstakken, Lasse. (2019) High frame rate color flow echocardiography: A comparison of different imaging approaches. Journal of the Acoustical Society of America. volum 146 (4).
Academic article
Salles, Sebastien; Løvstakken, Lasse; Aase, Svein Arne; Bjåstad, Tore Grüner; Torp, Hans. (2019) Clutter Filter Wave Imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 66 (9).
Academic article
Smistad, Erik; Salte, Ivar Mjåland; Østvik, Andreas; Leclerc, Sarah; Bernard, Olivier; Løvstakken, Lasse. (2019) Segmentation of apical long axis, four- and two-chamber views using deep neural networks. Proceedings - IEEE Ultrasonics Symposium. volum 2019-October.
Academic article
Tannvik, Tomas Dybos; Rimehaug, Audun Eskeland; Wigen, Morten Smedsrud; Løvstakken, Lasse; Kirkeby-Garstad, Idar. (2019) Ventriculo-arterial interaction may be assessed by Oscillatory Power Fraction. Clinical Physiology and Functional Imaging. volum 39 (5).
Academic article
Dietrichson, Fabian Sødal; Smistad, Erik; Østvik, Andreas; Løvstakken, Lasse. (2018) Ultrasound speckle reduction using generative adversial networks. Proceedings - IEEE Ultrasonics Symposium. volum 2018-October:8579764.
Academic article
Fiorito, Adrian Meidell; Østvik, Andreas; Smistad, Erik; Leclerc, Sarah; Bernard, Olivier; Løvstakken, Lasse. (2018) Detection of Cardiac Events in Echocardiography using 3D Convolutional Recurrent Neural Networks. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Grønli, Thomas; Wigen, Morten Smedsrud; Segers, Patrick; Løvstakken, Lasse. (2018) A fast 4D B-spline framework for model-based reconstruction and regularization in vector flow imaging. Proceedings - IEEE Ultrasonics Symposium. volum 2018-October.
Academic article
Iversen, Daniel Høyer; Løvstakken, Lasse; Unsgård, Geirmund; Reinertsen, Ingerid. (2018) Automatic intraoperative estimation of blood flow direction during neurosurgical interventions. International Journal of Computer Assisted Radiology and Surgery. volum 13 (5).
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Karabiyik, Yücel; Ekroll, Ingvild Kinn; Eik-Nes, Sturla; Løvstakken, Lasse. (2018) Quantitative Doppler analysis using conventional color flow imaging acquisitions. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 65 (5).
Academic article
Leclerc, Sarah; Smistad, Erik; Grenier, Thomas; Lartizien, Carole; Østvik, Andreas; Espinosa, Florian; Jodoin, Pierre-Marc; Løvstakken, Lasse; Bernard, Olivier. (2018) Deep learning applied to multi-structure segmentation in 2D echocardiography: A preliminary investigation of the required database size. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Perrot, Vincent; Avdal, Jørgen; Løvstakken, Lasse; Salles, Sebastien; Vray, Didier; Liebgott, Herve; Ekroll, Ingvild Kinn. (2018) Spatial and temporal adaptive FIR clutter filtering. Proceedings - IEEE Ultrasonics Symposium. volum 2018-October.
Academic article
Smistad, Erik; Østvik, Andreas; Salte, Ivar Mjåland; Leclerc, Sarah; Bernard, Olivier; Løvstakken, Lasse. (2018) Fully automatic real-time ejection fraction and MAPSE measurements in 2D echocardiography using deep neural networks. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Wigen, Morten Smedsrud; Fadnes, Solveig; Rodriguez-Molares, Alfonso; Bjåstad, Tore Grüner; Eriksen, Marius; STENSÆTH, KNUT HAAKON; Støylen, Asbjørn; Løvstakken, Lasse. (2018) 4-D Intracardiac Ultrasound Vector Flow Imaging-Feasibility and Comparison to Phase-Contrast MRI. IEEE Transactions on Medical Imaging. volum 37 (12).
Academic article
Østvik, Andreas; Smistad, Erik; Aase, Svein Arne; Haugen, Bjørn Olav; Løvstakken, Lasse. (2018) Real-time Standard View Classification in Transthoracic Echocardiography using Convolutional Neural Networks. Ultrasound in Medicine and Biology.
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Østvik, Andreas; Smistad, Erik; Espeland, Torvald; Berg, Erik Andreas Rye; Løvstakken, Lasse. (2018) Automatic Myocardial Strain Imaging in Echocardiography Using Deep Learning. Lecture Notes in Computer Science (LNCS). volum 11045 LNCS.
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Avdal, Jørgen; Løvstakken, Lasse; Torp, Hans; Ekroll, Ingvild Kinn. (2017) Combined 2-D Vector imaging and Tracking Doppler for improved vascular blood velocity quantification. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 64 (12).
Academic article
Fadnes, Solveig; Wigen, Morten Smedsrud; Nyrnes, Siri Ann; Løvstakken, Lasse. (2017) In vivo intracardiac vector flow imaging using phased array transducers for pediatric cardiology. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 64 (9).
Academic article
Rodriguez-Molares, Alfonso; Fatemi, Ali; Løvstakken, Lasse; Torp, Hans. (2017) Specular Beamforming. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 64 (9).
Academic article
Rodriguez-Molares, Alfonso; Rindal, Ole Marius Hoel; Bernard, Olivier; Nair, Arun; Bell, Muyinatu A. Lediju; Liebgott, Herve; Austeng, Andreas; Løvstakken, Lasse. (2017) The UltraSound ToolBox. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Rodriguez-Molares, Alfonso; Torp, Hans; Lippe, Boris; Løvstakken, Lasse. (2017) Sequential CPWC: from ultrafast to ultralight. Proceedings of SPIE, the International Society for Optical Engineering. volum 10139.
Academic article
Santos, Pedro; Løvstakken, Lasse; Samset, Eigil; D'Hooge, Jan. (2017) Volumetric imaging of fast mechanical waves in the heart using a clinical ultrasound system. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Smistad, Erik; Østvik, Andreas; Haugen, Bjørn Olav; Løvstakken, Lasse. (2017) 2D left ventricle segmentation using deep learning. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Avdal, Jørgen; Ekroll, Ingvild Kinn; Løvstakken, Lasse; Torp, Hans. (2016) Combined 2-D vector and tracking Doppler imaging for improved blood velocity quantification. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Ekroll, Ingvild Kinn; Avdal, Jørgen; Swillens, Abigail Emily; Torp, Hans; Løvstakken, Lasse. (2016) An Extended Least Squares Method for Aliasing-Resistant Vector Velocity Estimation. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 63 (11).
Academic article
Fadnes, Solveig; Nyrnes, Siri Ann; Wigen, Morten Smedsrud; Tegnander, Eva; Løvstakken, Lasse. (2016) Detailed flow visualization in fetal and neonatal hearts using 2-D speckle tracking. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Grønli, Thomas; Smistad, Erik; Nyrnes, Siri Ann; Gomez, Alberto; Løvstakken, Lasse. (2016) Reconstruction of In Vivo Flow Velocity Fields Based On a Rapid Ultrasound Image Segmentation and B-spline Regularization Framework. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Høgenes, Jakob; Wigen, Morten Smedsrud; Nyrnes, Siri Ann; Segers, P.; Swillens, Abigail; Løvstakken, Lasse. (2016) Model-based estimation of intra-cardiac blood flow velocities using an unscented Kalman filter. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Karabiyik, Yucel; Avdal, Jørgen; Ekroll, Ingvild Kinn; Torp, Hans; Løvstakken, Lasse. (2016) Data adaptive 2-D tracking Doppler. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Karabiyik, Yucel; Ekroll, Ingvild Kinn; Eik-Nes, Sturla; Avdal, Jørgen; Løvstakken, Lasse. (2016) Adaptive Spectral Estimation Methods in Color Flow Imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 63 (11).
Academic article
Rimehaug, Audun Eskeland; Skogvoll, Eirik; Aadahl, Petter; Lyng, Oddveig; Nordhaug, Dag Ole; Løvstakken, Lasse; Kirkeby-Garstad, Idar. (2016) Minimally invasive beat-by-beat monitoring of cardiac power in normal hearts and during acute ventricular dysfunction. Physiological Reports. volum 4:e12989 (19).
Academic article
Rodriguez-Molares, Alfonso; Avdal, Jørgen; Torp, Hans; Løvstakken, Lasse. (2016) Axial lobes in coherent plane-wave compounding. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Rodriguez-Molares, Alfonso; Fatemi, Seyed Ali Mohammad; Torp, Hans; Løvstakken, Lasse. (2016) Adaptive beamforming based on Snell's law of reflection. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Santos, Pedro; Haugen, Geir Ultveit; Løvstakken, Lasse; Samset, Eigil; D'Hooge, Jan. (2016) High frame rate 3D tissue velocity imaging using sub-aperture beamforming: A pilot study in vivo. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Santos, Pedro; Haugen, Geir Ultveit; Løvstakken, Lasse; Samset, Eigil; D'hooge, Jan R M. (2016) Diverging Wave Volumetric Imaging Using Subaperture Beamforming. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 63 (12).
Academic article
Smistad, Erik; Løvstakken, Lasse. (2016) Vessel detection in ultrasound images using deep convolutional neural networks. Lecture Notes in Computer Science (LNCS). volum 10008 LNCS.
Academic article
Van Cauwenberge, Joris; Løvstakken, Lasse; Fadnes, Solveig; Rodriguez-Molares, Alfonso; Vierendeels, Jan; Segers, Patrick; Swillens, Abigail. (2016) Assessing the Performance of Ultrafast Vector Flow Imaging in the Neonatal Heart via Multiphysics Modeling and in Vitro Experiments. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 63 (11).
Academic article
Wigen, Morten Smedsrud; Løvstakken, Lasse. (2016) In vivo three-dimensional intra-cardiac vector flow imaging using a 2D matrix array transducer. Proceedings - IEEE Ultrasonics Symposium. volum 2016-November.
Academic article
Avdal, Jørgen; Løvstakken, Lasse; Torp, Hans. (2015) Effects of reverberations and clutter filtering in pulsed Doppler using sparse sequences. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (5).
Academic article
Ekroll, Ingvild Kinn; Voormolen, Marco Marien; Standal, Øyvind Krøvel-Velle; Rau, Jochen; Løvstakken, Lasse. (2015) Coherent compounding in doppler imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (9).
Academic article
Fadnes, Solveig; Bjærum, Steinar; Torp, Hans; Løvstakken, Lasse. (2015) Clutter filtering influence on blood velocity estimation using speckle tracking. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (12).
Academic article
Fadnes, Solveig; Ekroll, Ingvild Kinn; Nyrnes, Siri Ann; Torp, Hans; Løvstakken, Lasse. (2015) Robust angle-independent blood velocity estimation based on dual-angle plane wave imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (10).
Academic article
Iversen, Daniel Høyer; Lindseth, Frank; Unsgård, Geirmund; Torp, Hans; Løvstakken, Lasse. (2015) Improved quality of freehand 3-D ultrasound color flow imaging by multi-angle compounding. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Rodriguez-Molares, Alfonso; Løvstakken, Lasse; Ekroll, Ingvild Kinn; Torp, Hans. (2015) Needle detection by image source localization. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Rodriguez-Molares, Alfonso; Løvstakken, Lasse; Ekroll, Ingvild Kinn; Torp, Hans. (2015) Reconstruction of specular reflectors by iterative image source localization. Journal of the Acoustical Society of America. volum 138 (3).
Academic article
Rodriguez-Molares, Alfonso; Løvstakken, Lasse; Torp, Hans; Martin-Herrero, Julio; Bjåstad, Tore Grüner. (2015) Detection of the Intima-Lumen interface by coherent combination of RF scanlines. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Rodriguez-Molares, Alfonso; Torp, Hans; Denarie, Bastien; Løvstakken, Lasse. (2015) The angular apodization in coherent plane-wave compounding. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (11).
Academic article
Santos, Pedro; Tong, Ling; Ortega, Alejandra; Løvstakken, Lasse; Samset, Eigil; D'hooge, Jan R M. (2015) Acoustic output of multi-line transmit beamforming for fast cardiac imaging: A simulation study. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 62 (7).
Academic article
Torp, Hans; Rodriguez-Molares, Alfonso; Løvstakken, Lasse. (2015) Optimum beamformer strategy for detecting signals in clutter noise. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Angelelli, Paolo; Snare, Sten Roar; Nyrnes, Siri Ann; Bruckner, Stefan; Hauser, Helwig; Løvstakken, Lasse. (2014) Live ultrasound-based particle visualization of blood flow in the heart. Spring conference on Computer graphics.
Academic article
Avdal, Jørgen; Ekroll, Ingvild Kinn; Fadnes, Solveig; Løvstakken, Lasse; Torp, Hans. (2014) 2D tracking doppler for cardiac jet flow velocity estimation. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Ekroll, Ingvild Kinn; Dahl, Torbjørn; Torp, Hans; Løvstakken, Lasse. (2014) Combined vector velocity and spectral doppler imaging for improved imaging of complex blood flow in the carotid arteries. Ultrasound in Medicine and Biology. volum 40 (7).
Academic article
Ekroll, Ingvild Kinn; Voormolen, Marco Marien; Standal, Øyvind Krøvel-Velle; Rau, Jochen; Løvstakken, Lasse. (2014) On the accuracy of coherent compounding Doppler imaging. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Fadnes, Solveig; Ekroll, Ingvild Kinn; Nyrnes, Siri Ann; Torp, Hans; Løvstakken, Lasse. (2014) Robust angle-independent blood velocity estimation based on multi-angle speckle tracking and vector Doppler. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Fadnes, Solveig; Nyrnes, Siri Ann; Torp, Hans; Løvstakken, Lasse. (2014) Shunt flow evaluation in congenital heart disease based on two-dimensional speckle tracking. Ultrasound in Medicine and Biology. volum 40 (10).
Academic article
Fredriksen, Tonje Dobrowen; Avdal, Jørgen; Ekroll, Ingvild Kinn; Dahl, Torbjørn; Løvstakken, Lasse; Torp, Hans. (2014) Investigations of spectral resolution and angle dependency in a 2-D tracking doppler method. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 61 (7).
Academic article
Kiss, Gabriel; Iversen, Daniel Høyer; Standal, Øyvind Krøvel-Velle; Rau, Jochen; Torp, Hans; Løvstakken, Lasse; Måsøy, Svein-Erik. (2014) A visualization tool for improved assessment and follow-up with ultrasound. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Nyrnes, Siri Ann; Løvstakken, Lasse; Døhlen, Gaute; Skogvoll, Eirik; Torp, Hans; Skjærpe, Terje; Norgård, Gunnar; Samstad, Stein; Graven, Torbjørn; Haugen, Bjørn Olav. (2014) Blood Flow Imaging in Transesophageal Echocardiography during Atrial Septal Defect Closure: A Comparison with the Current References. Echocardiography. volum 32 (1).
Academic article
Santos, Pedro; Tong, Ling; Ortega, Alejandra; Løvstakken, Lasse; Samset, Eigil; D'hooge, Jan R M. (2014) Safety of Multi-Line Transmit beam forming for fast cardiac imaging - A simulation study. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Swillens, Abigail; Shcherbakova, Darya; Trachet, Bram; Segers, Patrick; Ekroll, Ingvild Kinn; Løvstakken, Lasse. (2014) A multi-angle plane wave imaging approach for high frequency 2D flow visualization in small animals: Simulation study in the murine arterial system. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Denarie, Bastien; Tangen, Thor Andreas; Ekroll, Ingvild Kinn; Rolim, Natale Pinheiro Lage; Torp, Hans; Bjåstad, Tore; Løvstakken, Lasse. (2013) Coherent Plane Wave Compounding for Very High Frame Rate Ultrasonography of Rapidly Moving Targets. IEEE Transactions on Medical Imaging. volum 32 (7).
Academic article
Ekroll, Ingvild Kinn; Swillens, Abigail; Segers, Patrick; Dahl, Torbjørn; Torp, Hans; Løvstakken, Lasse. (2013) Simultaneous Quantification of Flow and Tissue Velocities Based on Multi-Angle Plane Wave Imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 60 (4).
Academic article
Fredriksen, Tonje Dobrowen; Ekroll, Ingvild Kinn; Løvstakken, Lasse; Torp, Hans. (2013) 2-D Tracking Doppler: A New Method to Limit Spectral Broadening in Pulsed Wave Doppler. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 60 (9).
Academic article
Iversen, Daniel Høyer; Lindseth, Frank; Unsgård, Geirmund; Torp, Hans; Løvstakken, Lasse. (2013) Model-Based Correction of Velocity Measurements in Navigated 3-D Ultrasound Imaging During Neurosurgical Interventions. IEEE Transactions on Medical Imaging. volum 32 (9).
Academic article
Rimehaug, Audun Eskeland; Lyng, Oddveig; Nordhaug, Dag Ole; Løvstakken, Lasse; Aadahl, Petter; Kirkeby-Garstad, Idar. (2013) Cardiac power integral: a new method for monitoring cardiovascular performance. Physiological Reports. volum 1 (6).
Academic article
Van Canneyt, K.; Swillens, Abigail; Løvstakken, Lasse; Antiga, L; Verdonck, P.; Segers, Patrick. (2013) The accuracy of ultrasound volume flow measurements in the complex flow setting of a forearm vascular access. Journal of Vascular Access. volum 14 (3).
Academic article
Ekroll, Ingvild Kinn; Dahl, Torbjørn; Torp, Hans; Løvstakken, Lasse. (2012) In vivo Vector Flow Imaing With Retrospective Pulsed Wave Doppler. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Ekroll, Ingvild Kinn; Torp, Hans; Løvstakken, Lasse. (2012) Spectral Doppler Estimation Utilizing 2-D Spatial Information and Adaptive Signal Processing. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 59 (6).
Academic article
Fadnes, Solveig; Nyrnes, Siri Ann; Swillens, Abigail; Torp, Hans; Løvstakken, Lasse. (2012) Shunt quantification in congenital heart disease based on two-dimensional speckle tracking. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Fredriksen, Tonje Dobrowen; Ekroll, Ingvild Kinn; Løvstakken, Lasse; Torp, Hans. (2012) 2D Tracking Doppler: A New Method to Limit Spectral Broadening in Pulsed Wave Doppler. Proceedings - IEEE Ultrasonics Symposium.
Academic article
Iversen, Daniel Høyer; Lindseth, Frank; Torp, Hans; Løvstakken, Lasse. (2012) Improved 3-D reconstruction of vascular flow based on plane wave imaging. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Løvstakken, Lasse; Nyrnes, Siri Ann; Haugen, Bjørn Olav; Torp, Hans. (2012) Angle-independent quantification of complex flow patterns in congenital heart disease. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Swillens, Abigail Emily; De Santis, G.; Degroote, Joris; Løvstakken, Lasse; Vierendeels, Jan; Segers, Patrick. (2012) Accuracy of carotid strain estimates from ultrasonic wall tracking: a study based on multiphysics simulations and in vivo data. IEEE Transactions on Medical Imaging. volum 31 (1).
Academic article
Swillens, Abigail; De Witte, Marloes; Nordgaard, Håvard B.; Løvstakken, Lasse; Van Loo, D.; Trachet, Bram; Vierendeels, Jan; Segers, Patrick. (2012) Effect of the degree of LAD stenosis on "competitive flow" and flow field characteristics in LIMA-to-LAD bypass surgery. Medical and Biological Engineering and Computing. volum 50 (8).
Academic article
Alnes, Solveig Søvik; Swillens, Abigail; Segers, Patrick; Torp, Hans; Løvstakken, Lasse. (2011) Clutter filtering issues in speckle tracking for two-dimensional blood velocity estimation - a potential solution based on compounded imaging. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Iversen, Daniel Høyer; Lindseth, Frank; Unsgård, Geirmund; Torp, Hans; Løvstakken, Lasse. (2011) Model-based correction of angle-dependencies in navigated3-D flow imaging during neurosurgical interventions. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Swillens, Abigail Emily; De Santis, G.; Degroote, Joris; Løvstakken, Lasse; Vierendeels, Jan; Segers, Patrick. (2011) Multiphysics modeling in support of ultrasonic image development: integration of fluid-structure interaction simulations and Field II applied to the carotid artery. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Swillens, Abigail Emily; De Santis, G.; Degroote, Joris; Løvstakken, Lasse; Vierendeels, Jan; Segers, Patrick. (2011) Strain estimation in the carotid artery from ultrasonic wall tracking: a multiphysics model study. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Swillens, Abigail Emily; Segers, Patrick; De Groote, Joris; Vierendeels, Jan; Løvstakken, Lasse. (2011) Improving ultrasonic imaging of the vascular wall and blood flow using a multiphysics simulation tool integrating fluid-structure interaction and ultrasound simulations. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Swillens, Abigail Emily; Segers, Patrick; Løvstakken, Lasse. (2011) A combined speckle tracking and phase-shift estimation approach for 2D blood flow imaging in the carotid bifurcation. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Ekroll, Ingvild Kinn; Torp, Hans; Løvstakken, Lasse. (2010) Retrospective PW-Doppler based on spatiotemporal adaptive signal processing. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Hergum, Torbjørn; Bjåstad, Tore Grüner; Løvstakken, Lasse; Kristoffersen, Kjell; Torp, Hans. (2010) Reducing Color Flow Artifacts caused by Parallel Beamforming. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 57 (4).
Academic article
Løvstakken, Lasse; Torp, Hans. (2010) Extended Velocity Range in Color Flow Imaging using Parallel Receive Beamforming. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Nordgaard, Håvard B.; Swillens, Abigail; Nordhaug, Dag Ole; Kirkeby-Garstad, Idar; Van Loo, D.; Vitale, Nicola; Segers, Patrick; Haaverstad, Rune; Løvstakken, Lasse. (2010) Impact of competitive flow on wall shear stress in coronary surgery: computational fluid dynamics of a LIMA-LAD model. Cardiovascular Research (CVR). volum 88 (3).
Academic article
Nyrnes, Siri Ann; Løvstakken, Lasse; Skogvoll, Eirik; Torp, Hans; Haugen, Bjørn Olav. (2010) Does a new ultrasound flow modality improve visualization of neonatal pulmonary veins?. Echocardiography. volum 27 (9).
Academic article
Solheim, Ole; Selbekk, Tormod; Løvstakken, Lasse; Tangen, Geir Arne; Solberg, Ole Vegard; Johansen, Tonni Franke; Cappelen, Johan; Unsgård, Geirmund. (2010) Intrasellar ultrasound in transsphenoidal surgery: a novel technique. Neurosurgery. volum 66 (1).
Academic article
Swillens, Abigail Emily; Degroote, J.; Vierendeels, Jan; Løvstakken, Lasse; Segers, Patrick. (2010) A simulation environment for validating ultrasonic blood flow and vessel wall imaging based on fluid-structure interaction simulations: ultrasonic assessment of arterial distension and wall shear rate. Medical Physics (Lancaster). volum 37 (8).
Academic article
Swillens, Abigail Emily; Segers, Patrick; Løvstakken, Lasse. (2010) Two-dimensional flow imaging in the carotid bifurcation using a combined speckle tracking and phase-shift estimator: a study based on ultrasound simulations and in vivo analysis. Ultrasound in Medicine and Biology. volum 36 (10).
Academic article
Swillens, Abigail Emily; Segers, Patrick; Torp, Hans; Løvstakken, Lasse. (2010) Two-dimensional blood velocity estimation with ultrasound: speckle tracking versus crossed-beam vector Doppler based on flow simulations in a carotid bifurcation model. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 57 (2).
Academic article
Yu, Alfred C. H.; Løvstakken, Lasse. (2010) Eigen-Based Clutter Filter Design for Ultrasound Color Flow Imaging: A Review. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 57 (5).
Academic article
Lindseth, Frank; Løvstakken, Lasse; Rygh, Ola Morten; Tangen, Geir Arne; Torp, Hans; Unsgaard, Geirmund. (2009) Blood Flow Imaging: An Angle-Independent Ultrasound Modality for Intraoperative Assessment of Flow Dynamics in Neurovascular Surgery. Neurosurgery. volum 65 (6).
Academic article
Frijlink, Martijn Egbert; Løvstakken, Lasse; Torp, Hans. (2009) Investigation of transmit and receive performance at the fundamental and third harmonic resonance frequency of a medical ultrasound transducer. Ultrasonics. volum 49 (8).
Academic article
Nordgaard, Håvard; Nordhaug, Dag; Kirkeby-Garstad, Idar; Løvstakken, Lasse; Vitale, Nicola; Haaverstad, Rune. (2009) Different graft flow patterns due to competitive flow or stenosis in the coronary anastomosis assessed by transit-time flowmetry in a porcine model. European Journal of Cardio-Thoracic Surgery. volum 36 (1).
Academic article
Swillens, A; De Schryver, T; Løvstakken, Lasse; Torp, Hans; Segers, P. (2009) Assessment of Numerical Simulation Strategies for Ultrasonic Color Blood Flow Imaging, Based on a Computer and Experimental Model of the Carotid Artery. Annals of Biomedical Engineering. volum 37 (11).
Academic article
Swillens, A; Løvstakken, Lasse; Kips, J; Torp, Hans; Segers, P. (2009) Ultrasound Simulation of Complex Flow Velocity Fields Based on Computational Fluid Dynamics. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 56 (3).
Academic article
Swillens, Abigail; Segers, Patrick; Torp, Hans; Løvstakken, Lasse. (2009) Two-dimensional flow velocity estimation in the carotid bifurcation: a study of crossed-beam vector Doppler and speckle tracking using computational fluid dynamics. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Frijlink, Martijn Egbert; Løvstakken, Lasse; Torp, Hans. (2008) Fundamental and Third Harmonic Operation of a Medical Phased Array Transducer. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Løvstakken, Lasse; Ibrahim, Khalid Shaker Oklah; Vitale, Nicola; Henriksen, Siren T.; Kirkeby-Garstad, Idar; Torp, Hans; Haaverstad, Rune. (2008) Blood Flow Imaging: A New Two-dimensional Ultrasound Modality for Enhanced Intraoperative Visualization of Blood Flow Patterns in Coronary Anastomoses. Journal of the American Society of Echocardiography. volum 21 (8).
Academic article
Oddershede, Niels; Løvstakken, Lasse; Torp, Hans; Jensen, Jørgen A.. (2008) Estimating 2-D vector velocities using multidimensional spectrum analysis. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 55 (8).
Academic article
Swillens, Abigail; Løvstakken, Lasse; Torp, Hans; Segers, Patrick. (2008) A comparison of multidimensional flow estimation techniques using computational fluid dynamics: speckle tracking versus vector Doppler. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Khalid, Ibrahim; Løvstakken, Lasse; Kirkeby-Garstad, Idar; Torp, Hans; Vik-Mo, Harald; Haaverstad, Rune. (2007) Effect of the Cardiac Cycle on the Coronary Anastomosis Assessed by Ultrasound. Asian Cardiovascular and Thoracic Annals. volum 15 (2).
Academic article
Løvstakken, Lasse; Bjærum, Steinar; Torp, Hans. (2007) Optimal velocity estimation in ultrasound Color Flow Imaging in presence of clutter. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 54 (3).
Academic article
Løvstakken, Lasse; Orderud, Fredrik; Torp, Hans. (2007) Real-time Indication of Acoustic Window for Phased-Array Transducers in Ultrasound Imaging. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Løvstakken, Lasse; Yu, Alfred C. H.; Torp, Hans. (2007) P6B-3 In Vivo Investigation of Filter order Influence in Eigen-based Clutter Filtering for Color Flow Imaging. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2007) Blood Flow Imaging - A New Angle-Independent Ultrasound Modality for the Visualization of Flow in Atrial Septal Defects in Children. Echocardiography. volum 24 (9).
Academic article
Oddershede, Niels; Løvstakken, Lasse; Torp, Hans; Jensen, Jørgen A.. (2007) Multi-dimensional spectrum analysis for 2-D vector velocity estimation. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Yu, Alfred C. H.; Løvstakken, Lasse. (2007) Eigen-Based Clutter Filters for Color Flow Imaging: Single-Ensemble vs. Multi-Ensemble Approaches. IEEE International Ultrasonics Symposium Proceedings.
Academic article
Løvstakken, Lasse; Bjærum, Steinar; Kristoffersen, K; Haaverstad, Rune; Torp, Hans. (2006) Real-time adaptive clutter rejection filtering in color flow imaging using power method iterations. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 53.
Academic article
Løvstakken, Lasse; Bjærum, Steinar; Martens, Ditlef; Torp, Hans. (2006) Blood flow imaging - A new real-time, 2-D flow imaging technique. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. volum 53 (2).
Academic article
Løvstakken, Lasse; Tangen, Thor Andreas; Bjærum, Steinar; Torp, Hans. (2006) Optimal velocity estimation in ultrasound Color Flow Imaging in presence of clutter noise. IEEE International Ultrasonics Symposium Proceedings.
Academic article

Journal publications

Pettersen, Håkon Neergaard; Sæbø, Sigbjørn; Pasdeloup, David Francis Pierre; Østvik, Andreas; Smistad, Erik; Stølen, Stian Bergseng; Grenne, Bjørnar; Løvstakken, Lasse; Dalen, Håvard; Holte, Espen. (2022) The impact of real-time feedback by deep learning during echocardiographic scanning on test-retest variability of left ventricular systolic function measurements. European Heart Journal-Cardiovascular Imaging. volum 23.
Summary/Abstract
Henry, Matthew; Fadnes, Solveig; Løvstakken, Lasse; Mawad, Wadi; Mertens, Luc; Nyrnes, Siri Ann. (2021) Bicuspid aortic valve flow dynamics using blood speckle tracking in children. European Heart Journal-Cardiovascular Imaging. volum 22.
Summary/Abstract
Sørensen, Kristian; Fadnes, Solveig; Salvesen, Øyvind; Mertens, Luc; Løvstakken, Lasse; Nyrnes, Siri Ann. (2021) Assessment of Regional Early Diastolic Intraventricular Pressure Gradients by Blood Speckle Tracking in Children. Journal of the American Society of Echocardiography. volum 34 (6).
Summary/Abstract
Mawad, Wadi; Fadnes, Solveig; Grønli, Thomas; Løvstakken, Lasse; Mertens, Luc; Nyrnes, Siri Ann. (2020) Children with Pulmonary Hypertension Have Abnormal Flow patterns in the Main Pulmonary Artery as Shown By High Frame Rate Ultrasound Imaging. Journal of the American Society of Echocardiography. volum 33 (3).
Summary/Abstract
Sengupta, Partho P.; Shrestha, Sirish; Berthon, Béatrice; Messas, Emmanuel; Donal, Erwan; Tison, Geoffrey H.; Min, James K.; D'Hooge, Jan R M; Voigt, Jens-Uwe; Dudley, Joel; Verjans, Johan W.; Shameer, Khader; Johnson, Kipp; Løvstakken, Lasse; Tabassian, Mahdi; Piccirilli, Marco; Pernot, Mathieu; Yanamala, Naveena; Duchateau, Nicolas; Kagiyama, Nobuyuki; Bernard, Olivier; Slomka, Piotr; Deo, Rahul; Arnaout, Rima. (2020) Proposed Requirements for Cardiovascular Imaging-Related Machine Learning Evaluation (PRIME): A Checklist: Reviewed by the American College of Cardiology Healthcare Innovation Council. JACC Cardiovascular Imaging. volum 13 (9).
Scientific translation/review
Sørensen, Kristian; Fadnes, Solveig; Wigen, Morten Smedsrud; Salvesen, Øyvind; Mertens, Luc; Løvstakken, Lasse; Nyrnes, Siri Ann. (2020) Assessment of Diastolic Intraventricular Pressure Gradients in Children by Blood Speckle Tracking. A Feasibility Study. Journal of the American Society of Echocardiography. volum 33 (3).
Summary/Abstract
Aakervik, Anne-Lise; Løvstakken, Lasse; Torp, Hans; Aakhus, Svend. (2019) Lydbølger som er viktig for helsa. Gemini.
Popular scientific article
Fadnes, Solveig; Tegnander, Eva; Nyrnes, Siri Ann; Løvstakken, Lasse. (2017) Vector Flow Imaging of Fetal Circulation using Diverging Waves. Proceedings - IEEE Ultrasonics Symposium.
Summary/Abstract
Grønli, Thomas; Swillens, Abigail Emily; Segers, Patrick; Løvstakken, Lasse. (2017) Real-time assimilation and regularization of ultrasound blood velocity measurements using smoothed particle hydrodynamics. Proceedings - IEEE Ultrasonics Symposium. volum 2017.
Summary/Abstract
Mawad, Wadi; Løvstakken, Lasse; Fadnes, Solveig; Mertens, Luc; Nyrnes, Siri Ann. (2017) Right ventricular flow dynamics in dilated right ventricles. Energy loss estimation based on blood speckle tracking echocardiography in children. Journal of the American Society of Echocardiography. volum 30 (6).
Summary/Abstract
Salles, Sebastien; Aase, Svein Arne; Bjåstad, Tore Grüner; Løvstakken, Lasse; Torp, Hans. (2017) Clutter filter wave imaging (CFWI): A new way to visualize and detect mechanical waves propagation. Proceedings - IEEE Ultrasonics Symposium.
Summary/Abstract
Salles, Sebastien; Rodriguez-Molares, Alfonso; Støylen, Asbjørn; Bjåstad, Tore Grüner; Aase, Svein Arne; Løvstakken, Lasse; Torp, Hans. (2017) 3D myocardial mechanical wave measurements using high frame rate ultrasound imaging and Clutter filter wave imaging: Towards a 3D myocardial elasticity mapping. Proceedings - IEEE Ultrasonics Symposium.
Summary/Abstract
Wigen, Morten Smedsrud; Rodriguez-Molares, Alfonso; Bjåstad, Tore Grüner; Eriksen, Marius; STENSÆTH, KNUT HAAKON; Løvstakken, Lasse. (2017) In-vivo 3D cardiac vector flow imaging - A comparison between ultrasound and phase-contrast MRI. Proceedings - IEEE Ultrasonics Symposium.
Summary/Abstract
Østvik, Andreas; Smistad, Erik; Aase, Svein Arne; Haugen, Bjørn Olav; Løvstakken, Lasse. (2017) Real-time classification of standard cardiac views in echocardiography using neural networks. Proceedings - IEEE Ultrasonics Symposium.
Summary/Abstract
Nyrnes, Siri Ann; Løvstakken, Lasse. (2015) Flow speckle tracking provides new information of complex blood flow in congenital heart disease. Cardiology in the Young. volum 25.
Summary/Abstract
Johnsen, Ingvild Bjellmo; Løvstakken, Lasse; Åsvold, Bjørn Olav; Høydal, Morten; Sætrom, Pål; Bonnevie, Tora. (2014) NTNUs stjerneforskere. Adresseavisen.
publications.INTERVJUSKRIFTL
Nyrnes, Siri Ann; Løvstakken, Lasse; Døhlen, Gaute; Skogvoll, Eirik; Torp, Hans; Skjærpe, Terje; Norgård, Gunnar; Samstad, Stein; Graven, Torbjørn; Haugen, Bjørn Olav. (2013) Transesophageal echocardiography with Blood Flow Imaging during Atrial Septal defect closure: A comparison with the current references. Cardiology in the Young. volum 23.
Summary/Abstract
Iversen, Daniel Høyer; Lindseth, Frank; Torp, Hans; Løvstakken, Lasse. (2012) Model-based correction of angle-dependencies in navigated 3-D flow imaging during neurosurgical interventions. IEEE International Ultrasonics Symposium Proceedings.
Summary/Abstract
Nyrnes, Siri Ann; Løvstakken, Lasse. (2012) Raskere og sikrere diagnose. Hjertebarnet.
Article
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2011) Change in left ventricular vortex flow before and after surgery for coarctation of the aorta in an infant shown with plane wave imaging and flow speckle tracking. Cardiology in the Young. volum 21.
Summary/Abstract
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2011) Flow speckle tracking for detailed visualization of flow patterns in neonates with congenital heart defects. European Heart Journal-Cardiovascular Imaging.
Summary/Abstract
Nyrnes, Siri Ann; Løvstakken, Lasse; Skogvoll, Eirik; Torp, Hans; Haugen, Bjørn Olav. (2010) Does a new ultrasound flow modality improve visualization of neonatal pulmonary veins?. Hjerteforum. volum 23 (1).
Summary/Abstract
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans. (2009) Plane wave imaging for high frame rate flow visualisation in neonates with congenital heart disease. European Heart Journal-Cardiovascular Imaging. volum 10.
Summary/Abstract
Nyrnes, Siri Ann; Løvstakken, Lasse. (2008) Ny norsk ultralyd. ComputerWorld Norge.
publications.INTERVJUSKRIFTL
Nyrnes, Siri Ann; Løvstakken, Lasse. (2008) Ny ultralydmetode gir bedre blodstrømsbilder. Dagens medisin.
Article
Nyrnes, Siri Ann; Løvstakken, Lasse. (2008) Ny ultralydmetode hjelper barn. VG : Verdens gang.
publications.INTERVJUSKRIFTL
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2008) The coronary arteries visualised by a new ultrasound flow modality. European Heart Journal-Cardiovascular Imaging. volum 9.
Summary/Abstract
Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2007) A new ultrasound modality to visualise atrial septal defect flow in children. European Heart Journal-Cardiovascular Imaging. volum 8.
Summary/Abstract

Part of book/report

Viggen, Erlend Magnus; Løvstakken, Lasse; Merciu, Ioan Alexandru; Måsøy, Svein-Erik. (2021) Better Automatic Interpretation of Cement Evaluation Logs through Feature Engineering. IADC/SPE Managed Pressure Drilling & Underbalanced Operations Conference & Exhibition, Virtual, September 2021.
Academic chapter/article
Løvstakken, Lasse; Møllerløkken, Andreas; Måsøy, Svein-Erik. (2009) Current trends in ultrasound imaging technology, SURF imaging, and decompression induced microbubbles. The future of diving: 100 years of haldane and beyond.
Academic chapter/article

Report

Løvstakken, Lasse. (2007) Signal processing in diagnostic ultrasound: Algorithms for real-time estimation and visualization of blood flow velocity. 2007. ISBN 978-82-471-0525-2.
PhD thesis

Teaching

Courses

Media

2022

Poster

Chernyshov, Artem; Østvik, Andreas; Smistad, Erik; Løvstakken, Lasse. (2022) Segmentation of 2D cardiac ultrasound with deep learning: simpler models for a simple task. IEEE IUS 2022 . IEEE; Venice. 2022-10-10 - 2022-10-13.
Poster

Fermann, Benjamin Strandli; Aase, Svein Arne; Nyberg, John; Grue, Jahn Frederik; Grenne, Bjørnar; Dalen, Håvard; Remme, Espen; Løvstakken, Lasse; Østvik, Andreas. (2022) Cardiac event detection in echocardiography using deep learning and triplane recordings. IEEE 2022 International Ultrasonics Symposium (IUS) . Institue of Electrical and Electronics Engineers (IEEE); Venice. 2022-10-10 - 2022-10-13.
Academic lecture

Garone, Rosa Virginia; Lønmo, Tor Inge Birkenes; Tichy, Frank; Diesing, Markus; Thorsnes, Terje; Schimel, Alexandre Carmelo Gregory; Løvstakken, Lasse. (2022) Deep Learning for seafloor sediment mapping: a preliminary investigation using U-Net. Geohab 2022, Marine Geological & Biological Mapping ; Venezia. 2022-05-16 - 2022-05-20.
Academic lecture

Hu, Jieyu; Smistad, Erik; Salte, Ivar Mjåland; Dalen, Håvard; Løvstakken, Lasse. (2022) Exploiting temporal information in echocardiography for improved image segmentation. IEEE IUS 2022 lecture presentation . IEEE IUS; Venice. 2022-10-11 - 2022-10-13.
Lecture

Løvstakken, Lasse. (2022) Automatiserte målinger - hvordan gjør maskinen det?. Norsk Cardiologisk Selskap (NCS) høstmøte . Norsk Cardiologisk Selskap (; Oslo. 2022-10-27 - 2022-10-29.
Academic lecture

Mohajery, Mohammad; Espeland, Torvald; Berg, Erik Andreas Rye; Fadnes, Solveig; Salles, Sebastien; Amundsen, Brage H.; Aakhus, Svend; Løvstakken, Lasse. (2022) 3D mechanical wave imaging – initial analysis and insight. Leuven online meeting on myocardial function imaging ; 2022-02-10 - 2022-02-12.
Academic lecture

Mohajery, Mohammad; Fadnes, Solveig; Espeland, Torvald; Salles, Sebastien; Løvstakken, Lasse. (2022) Three-dimensional velocity estimation of natural mechanical waves in the myocardium. International ultrasonics symposium . IEEE; Italy. 2022-10-10 - 2022-10-13.
Academic lecture

Olaisen, Sindre Hellum; Smistad, Erik; Grenne, Bjørnar; Holte, Espen; Løvstakken, Lasse; Dalen, Håvard. (2022) Real-time AI-assisted calculation of left ventricular ejection fraction in echocardiography. 20th Annual Norwegian Symposium on Heart Research . NORHEART; Holmenkollen, Oslo. 2022-09-08 - 2022-09-09.
Academic lecture

Olaisen, Sindre Hellum; Smistad, Erik; Østvik, Andreas; Hu, Jieyu; Pasdeloup, David Francis Pierre; Stylidis, Michael; Rosner, Assami; Grenne, Bjørnar; Holte, Espen; Løvstakken, Lasse; Dalen, Håvard. (2022) Automatic calculation of left ventricular ejection fraction using artificial intelligence. Kardiologisk høstmøte 2022 . Norsk Cardiologisk Selskap; Fornebu, Oslo. 2022-10-27 - 2022-10-29.
Poster

Pasdeloup, David Francis Pierre; Sæbø, Sigbjørn; Olaisen, Sindre Hellum; Pettersen, Håkon Neergaard; Østvik, Andreas; Holte, Espen; Grenne, Bjørnar; Stølen, Stian Bergseng; Smistad, Erik; Dalen, Håvard; Løvstakken, Lasse. (2022) Real-Time Echocardiography Guidance for Optimized Apical Standard Views. IEEE International Ultrasound Symposium . IEEE; 2022-10-10 - 2022-10-13.
Poster

Pasdeloup, David Francis Pierre; Sæbø, Sigbjørn; Olaisen, Sindre Hellum; Pettersen, Håkon Neergaard; Østvik, Andreas; Holte, Espen; Grenne, Bjørnar; Stølen, Stian Bergseng; Smistad, Erik; Dalen, Håvard; Løvstakken, Lasse. (2022) Real-Time Echocardiography Guidance for Optimized Apical Standard Views. PRESIMAL Autumn Research School ; 2022-09-14 - 2022-09-16.
Poster

Smistad, Erik; Dalen, Håvard; Grenne, Bjørnar; Løvstakken, Lasse. (2022) Segmentation of parasternal long axis views using deep learning. IEEE International Ultrasonics Symposium 2022 ; 2022-10-10 - 2022-10-13.
Academic lecture

Smistad, Erik; Østvik, Andreas; Grue, Jahn Frederik; Dalen, Håvard; Løvstakken, Lasse. (2022) Tracking-based mitral annular plane systolic excursion (MAPSE) measurement using deep learning in B-mode ultrasound. IEEE International Ultrasonics Symposium 2022 ; 2022-10-10 - 2022-10-13.
Academic lecture

Szerypo Magelssen, Malgorzata Izabela; Hjorth-Hansen, Anna; Andersen, Garrett Newton; Graven, Torbjørn; Kleinau, Olaf; Skjetne, Kyrre; Løvstakken, Lasse; Dalen, Håvard; Mjølstad, Ole Christian. (2022) The importance of patient characteristics, operators, and image quality for accurate diagnoses of heart failure by general practitioners using hand-held ultrasound. European Heart Congress . ESC; Barcelona. 2022-08-26 - 2022-08-29.
Academic lecture

Sæbø, Sigbjørn; Pettersen, Håkon Neergaard; Østvik, Andreas; Pasdeloup, David Francis Pierre; Smistad, Erik; Stølen, Stian Bergseng; Grenne, Bjørnar; Løvstakken, Lasse; Holte, Espen; Dalen, Håvard. (2022) Automated analyses and real-time guiding by deep learning to reduce test-retest variability of global longitudinal strain. ESC 2022 ; Barcelona. 2022-08-25 - 2022-08-29.
Academic lecture

Sæbø, Sigbjørn; Pettersen, Håkon Neergaard; Østvik, Andreas; Smistad, Erik; Pasdeloup, David Francis Pierre; Grenne, Bjørnar; Stølen, Stian Bergseng; Løvstakken, Lasse; Holte, Espen; Dalen, Håvard. (2022) Automated analyses and real-time guiding by deep learning to reduce variability of global longitudinal strain. CIUS Fall Conference 2022 . CIUS; Trondheim. 2022-11-09.
Academic lecture

Wifstad, Sigurd Vangen; Hauge, Ståle Wågen; Seljelv, Sigvard Johansen; Sæbø, Sigbjørn; Mekonnen, Desalew; Nega, Berhanu; Abebe, Sintayehu; Estensen, Mette-Elise; Haaverstad, Rune; Dalen, Håvard; Løvstakken, Lasse. (2022) Tracking heart valve motion from transthoracic echocardiography using deep learning. Autumn Research School in Artificial Intelligence Methods in Medical Imaging 2022 . PRESIMAL, MMIV, UIB; Solstrand. 2022-09-14 - 2022-09-16.
Academic lecture

Wifstad, Sigurd Vangen; Hauge, Ståle Wågen; Seljelv, Sigvard Johansen; Sæbø, Sigbjørn; Mekonnen, Desalew; Nega, Berhanu; Abebe, Sintayehu; Estensen, Mette-Elise; Haaverstad, Rune; Dalen, Håvard; Løvstakken, Lasse. (2022) Tracking heart valve motion from transthoracic echocardiography using deep learning. IEEE International Ultrasonics Symposium (IUS) ; Venezia. 2022-10-11 - 2022-10-13.
Academic lecture

Yari, Yasin; Løvstakken, Lasse; Måsøy, Svein-Erik; Næve, Ingun; Bergtun, Per Helge; Voormolen, Marco Marien. (2022) Ultrasound and Deep Learning for Automated Maturation Prediction of Atlantic Salmon. IUS 2022 ; 2022-10-10 - 2022-10-13.

2021

Academic lecture

Espeland, Torvald; Wigen, Morten Smedsrud; Berg, Erik Andreas Rye; Salles, Sebastien; Løvstakken, Lasse; Amundsen, Brage H.; Aakhus, Svend. (2021) Mechanical wave velocities by high frame rate imaging in healthy subjects. MEETING ON MYOCARDIAL FUNCTION IMAGING . KU LEUVEN; Leuven. 2021-02-04 - 2021-02-06.
Academic lecture

Grønli, Thomas; Wigen, Morten Smedsrud; Daae, Annichen Søyland; Segers, Patrick; Støylen, Asbjørn; Løvstakken, Lasse; Fadnes, Solveig. (2021) Model-Based Regularization for Non-Invasive Intraventricular Flow and Pressure Estimates in 4D Ultrasound Imaging. International Ultrasonics Symposium . IEEE UFFC; Virtual. 2021-09-11 - 2021-09-16.
Poster

Hu, Jieyu; Olaisen, Sindre Hellum; Smistad, Erik; Dalen, Håvard; LÃ¸vstakken, Lasse. (2021) Fully automated left atrium quantification using deep learning. IEEE IUS 2021 ; 2021-09-11 - 2021-09-16.
Poster

Mohajery, Mohammad; Wigen, Morten Smedsrud; Fadnes, Solveig; Pasdeloup, David Francis Pierre; Smistad, Erik; Espeland, Torvald; Salles, Sebastien; Løvstakken, Lasse. (2021) The variation of natural myocardial mechanical wave velocities due to 3D propagation. International Ultrasonics Symposium . IEEE; Virtual. 2021-09-11 - 2021-09-16.
Poster

Pasdeloup, David Francis Pierre; Olaisen, Sindre Hellum; Ãstvik, Andreas; Holte, Espen; Grenne, Bjørnar; Sæbo, Sigbjørn; Smistad, Erik; Dalen, Håvard; LÃ¸vstakken, Lasse. (2021) Real-time Image Guiding in Echocardiography using Deep Learning. International Ultrasound Symposium ; 2021-09-11 - 2021-09-16.
Academic lecture

Pettersen, Håkon Neergaard; Sæbø, Sigbjørn; Pasdeloup, David Francis Pierre; Østvik, Andreas; Smistad, Erik; Stølen, Stian; Grenne, Bjørnar; Løvstakken, Lasse; Dalen, Håvard; Holte, Espen. (2021) Impact of real-time feedback by deep learning during echocardiography on test-retest variability of left ventricular systolic function measurements. CIUS Fall Conference 2021 . Centre for Innovative Ultrasound Solutions; Trondheim. 2021-12-07 - 2021-12-08.
Academic lecture

Pettersen, Håkon Neergaard; Sæbø, Sigbjørn; Pasdeloup, David Francis Pierre; Østvik, Andreas; Smistad, Erik; Stølen, Stian; Grenne, Bjørnar; Løvstakken, Lasse; Dalen, Håvard; Holte, Espen. (2021) The impact of real-time feedback by deep learning during echocardiography on test-retest variability of left ventricular systolic function measurements. EuroEcho 2021 . European Society of Cardiology; Berlin. 2021-12-09 - 2021-12-11.
Academic lecture

Smistad, Erik; Ãstvik, Andreas; LÃ¸vstakken, Lasse. (2021) Annotation Web - An open-source web-based annotation tool for ultrasound images. IEEE International Ultrasonics Symposium . IEEE; 2021-09-11 - 2021-09-16.
Academic lecture

Smistad, Erik; Salte, Ivar Mjåland; Dalen, Håvard; LÃ¸vstakken, Lasse. (2021) Real-time temporal coherent left ventricle segmentation using convolutional LSTMs. IEEE International Ultrasonics Symposium . IEEE; 2021-09-11 - 2021-09-16.
Academic lecture

Smistad, Erik; Steinsland, Erik Nikolai; LÃ¸vstakken, Lasse. (2021) Real-time 3D left ventricle segmentation and ejection fraction using deep learning. IEEE International Ultrasonics Symposium . IEEE; 2021-09-11 - 2021-09-16.
Poster

Sæbø, Sigbjørn; Pettersen, Håkon Neergaard; Pasdeloup, David Francis Pierre; Smistad, Erik; Stølen, Stian Bergseng; Grenne, Bjørnar; Løvstakken, Lasse; Holte, Espen; Dalen, Håvard. (2021) Real-time automatic feedback by deep learning to reduce apical foreshortening in echocardiography. EuroEcho 2021 ; 2021-12-09.
Poster

Sørensen, Kristian; Fadnes, Solveig; Salvesen, Øyvind; Mertens, Luc; Løvstakken, Lasse; Nyrnes, Siri Ann. (2021) Assessment of Regional Early Diastolic Intraventricular Pressure Gradients by Blood Speckle Tracking in Children. ASE 2021 . American Society of echocardiography; Boston, konvertert til digital konferanse pga Covid 19. 2021-06-18 - 2021-06-21.
Academic lecture

Viggen, Erlend Magnus; Løvstakken, Lasse; Merciu, Ioan Alexandru; Måsøy, Svein-Erik. (2021) Better Automatic Interpretation of Cement Evaluation Logs through Feature Engineering. SPE/IADC Virtual International Drilling Conference and Exhibition . SPE/IADC; Online. 2021-03-08 - 2021-03-21.
Academic lecture

Wifstad, Sigurd Vangen; Løvstakken, Lasse; Avdal, Jørgen; Torp, Hans; Fiorentini, Stefano. (2021) Automatic quantification of valve insufficiency using 3D Doppler ultrasound and deep learning. CIUS conference . Centre of Innovative Ultrasound Solutions; Virituelt. 2021-04-28.
Poster

Wifstad, Sigurd Vangen; Løvstakken, Lasse; Avdal, Jørgen; Torp, Hans; Fiorentini, Stefano. (2021) Automatic quantification of valvular insufficiency using 3D Doppler imaging and Deep Learning. International Ultrasonics Symposium 2021 . IEEE; Virituelt. 2021-09-11 - 2021-09-16.
Poster

Wifstad, Sigurd Vangen; Løvstakken, Lasse; Avdal, Jørgen; Torp, Hans; Fiorentini, Stefano. (2021) Automatic quantification of valvular insufficiency using 3D Doppler imaging and deep learning. Probabilistic AI summer school . NTNU; Virituelt. 2021-06-14 - 2021-06-18.

2020

Academic lecture

Espeland, Torvald; Salles, Sebastien; Støylen, Asbjørn; Berg, Erik Andreas Rye; Hammer, Tommy; Amundsen, Brage H.; Aakhus, Svend; Løvstakken, Lasse; Torp, Hans. (2020) Measuring myocardial mechanical wave velocities using 3D – initial clinical results. MEETING ON MYOCARDIAL FUNCTION IMAGING . KU LEUVEN; Leuven. 2020-02-06 - 2020-02-07.
Poster

Fadnes, Solveig; Sørensen, Kristian; Nyrnes, Siri Ann; Wigen, Morten Smedsrud; Løvstakken, Lasse. (2020) Intranventricular Pressure Gradients - Vector Flow Imaging versus Color M-Mode. IEEE International Ultrasonics Symposium 2020 ; 2020-09-08 - 2020-09-11.
Academic lecture

Grønli, Thomas; Leinan, Paul Roger; Wigen, Morten Smedsrud; Skjetne, Paal; Nyrnes, Siri Ann; Dahl, Sigrid Kaarstad; Løvstakken, Lasse. (2020) Flow regularization and reconstruction in echocardiography. Meeting on Myocardial Function Imaging . KU Leuven; Heverlee. 2020-02-06 - 2020-02-07.
Academic lecture

Grønli, Thomas; Wigen, Morten Smedsrud; Eriksen, Marius; Stensæth, Knut Haakon; Løvstakken, Lasse. (2020) A Fully Automated Ultrasound Imaging Pipeline for 4D Intraventricular Flow Reconstruction - in Vivo Comparison to Phase-Contrast MRI. 2020 IEEE International Ultrasonics Symposium . IEEE UFFC; Las Vegas (Virtual). 2020-09-06 - 2020-09-11.
Academic lecture

Henry, Matthew; Fadnes, Solveig; Løvstakken, Lasse; Mawad, Wadi; Mertens, Luc; Nyrnes, Siri Ann. (2020) Bicuspid aortic valve assessment using blood speckle tracking in children. EACVI Best of Imaging 2020 . European Society of Cardiology; Webbased. 2020-12-11 - 2020-12-12.
Academic lecture

Løvstakken, Lasse. (2020) Simplifying echocardiography - opportunities and challenges. MICCAI ASMUS workshop ; Virtual. 2020-10-04 - 2020-10-08.
Poster

Mawad, Wadi; Fadnes, Solveig; Grønli, Thomas; Løvstakken, Lasse; Mertens, Luc; Nyrnes, Siri Ann. (2020) Children with Pulmonary Hypertension Have Abnormal Flow patterns in the Main Pulmonary Artery as Shown By High Frame Rate Ultrasound Imaging. ASE 2020 ; 2020-08-08 - 2020-08-10.
Poster

Pasdeloup, David Francis Pierre; Østvik, Andreas; Smistad, Erik; Løvstakken, Lasse; Dalen, Håvard; Olaisen, Sindre Hellum; Grønli, Thomas. (2020) Automatic Apical Standard Views extraction from 3D ultrasound volumes using Deep Learning. Virtual IEEE IUS Symposium ; 2020-09-06 - 2020-09-11.
Academic lecture

Salles, Sebastien; Fadnes, Solveig; Nyrnes, Siri Ann; Løvstakken, Lasse. (2020) High-frame-rate imaging of cardiac tissue-flow interaction: Towards the origin of the atrial kick wave. IEEE International Ultrasonics Symposium 2020 ; 2020-09-08 - 2020-09-11.
Poster

Sørensen, Kristian; Fadnes, Solveig; Wigen, Morten Smedsrud; Salvesen, Øyvind; Mertens, Luc; Løvstakken, Lasse; Nyrnes, Siri Ann. (2020) Assessment of Diastolic Intraventricular Pressure Gradients in Children by Blood Speckle Tracking. A Feasibility Study. ASE 2020 Virtual Experience . American Society of echocardiography; Denver USA. 2020-08-08 - 2020-08-10.
Academic lecture

Wigen, Morten Smedsrud; Fiorentini, Stefano; Støylen, Asbjørn; Løvstakken, Lasse. (2020) Aortic volume flow estimation using 4D vector flow imaging. 2020 IEEE International Ultrasonics Symposium . IEEE; 2020-10-08 - 2020-10-11.

2019

Academic lecture

Alessandro, Ramalli; Rodriguez-Molares, Alfonso; Avdal, Jørgen; D'Hooge, Jan R M; Løvstakken, Lasse. (2019) The effect of high frame rate imaging methods in clinical color flow echocardiography. IEEE International Ultrasonics symposium ; Glasgow. 2019-10-06 - 2019-10-09.
Academic lecture

Daae, Annichen Søyland; Wigen, Morten Smedsrud; Løvstakken, Lasse; Støylen, Asbjørn. (2019) Vortex formation during the isovolumetric contraction in the left ventricle. Euro Echo . European Association of Cardiovascular Imaging; Wien. 2019-12-04 - 2019-12-07.
Academic lecture

Grønli, Thomas; Leinan, Paul Roger; Wigen, Morten Smedsrud; Skjetne, Paal; Dahl, Sigrid Kaarstad; Løvstakken, Lasse. (2019) In vitro validation of ultrasound VFI regularization through rapid data assimilation. 2019 IEEE International Ultrasonics Symposium ; 2019-10-06 - 2019-10-09.
Academic lecture

Grønli, Thomas; Leinan, Paul Roger; Wigen, Morten Smedsrud; Skjetne, Paal; Dahl, Sigrid Kaarstad; Løvstakken, Lasse. (2019) Variational Data Assimilation - Towards Robust Vector Flow Estimation with Ultrasound. Cardiac Imaging Day 2019 . Dept. of Heart Disease, Haukeland University Hospital; Bergen. 2019-10-18 - 2019-10-18.
Academic lecture

Leclerc, Sarah; Smistad, Erik; Grenier, Thomas; Lartizien, Carole; Østvik, Andreas; Cervenansky, Frederic; Espinosa, Florian; Espeland, Torvald; Berg, Erik Andreas Rye; Jodoin, Pierre-Marc; Løvstakken, Lasse; Bernard, Olivier. (2019) RU-Net: A Refining Segmentation Network for 2D Echocardiography. IEEE International Ultrasonics Symposium (IUS) ; Glasgow. 2019-10-06 - 2019-10-09.
Academic lecture

Leclerc, Sarah; Smistad, Erik; Østvik, Andreas; Cervenansky, Frederic; Espinosa, Florian; Espeland, Torvald; Berg, Erik Andreas Rye; Jodoin, Pierre-Marc; Grenier, Thomas; Lartizien, Carole; Løvstakken, Lasse; Bernard, Olivier. (2019) Deep Learning Segmentation in 2D echocardiography using the CAMUS dataset : Automatic Assessment of the Anatomical Shape Validity. International Conference on Medical Imaging with Deep Learning ; London. 2019-07-08 - 2019-07-10.
Popular scientific lecture

Løvstakken, Lasse; Måsøy, Svein-Erik; Søraunet, Arild; Nyrnes, Siri Ann; Rau, Jochen; Njølstad, Tormod; Martinussen, Hanne. (2019) "Ultralydhovedstaden" (Innovasjonsfrokost). Populærvitenskapelig frokostseminar med påmelding . Technoport, Næringsforeningen, Trondheimsregionen og CIUS; Work-work, Munkegata 58, Trondheim. 2019-02-28 - 2019-02-28.
Academic lecture

Løvstakken, Lasse; Østvik, Andreas; Smistad, Erik. (2019) Deep learning for automated anatomical and deformation measurements in echocardiography. Leuven Meeting on Myocardial Function Imaging ; 2019-02-07 - 2019-02-09.
Academic lecture

Løvstakken, Lasse; Østvik, Andreas; Smistad, Erik. (2019) Deep learning for automated anatomical and deformation measurements in echocardiography. Annual congress of the Belgian working group on non-invasive cardiac imaging ; Brüssel. 2019-10-24 - 2019-10-26.
Academic lecture

Løvstakken, Lasse; Østvik, Andreas; Smistad, Erik. (2019) Kunstig intelligens for en mer effektiv og treffsikker ekkokardiografi. Kardiologisk høstmøte ; 2019-10-24 - 2019-10-26.
Academic lecture

Løvstakken, Lasse; Østvik, Andreas; Smistad, Erik. (2019) Machine learning for improved echocardiography. The Artimino Conference on Medical Ultrasound Technology ; Nijmegen. 2019-06-23 - 2019-06-26.
Academic lecture

Pasdeloup, David Francis Pierre; Østvik, Andreas; Smistad, Erik; Løvstakken, Lasse. (2019) Retraining strategies for improved generalization of deep neural networks. IEEE International Ultrasonics symposium ; Glasgow. 2019-10-06 - 2019-10-09.
Academic lecture

Salles, Sebastien; Løvstakken, Lasse; Espeland, Torvald; Wigen, Morten Smedsrud; Fadnes, Solveig; Støylen, Asbjørn; Torp, Hans. (2019) 3D mechanical wave trajectory mapping in the left ventricle using Clutter Filter Wave Imaging. 2019 IEEE International Ultrasonics Symposium ; 2019-10-06 - 2019-10-09.
Academic lecture

Smistad, Erik; Salte, Ivar Mjåland; Østvik, Andreas; Leclerc, Sarah; Bernard, Olivier; Løvstakken, Lasse. (2019) Segmentation of apical long axis, four- and two-chamber views using deep neural networks. IEEE International Ultrasonics Symposium (IUS) . IEEE; Glasgow. 2019-10-06 - 2019-10-10.
Academic lecture

Torp, Hans; Løvstakken, Lasse. (2019) Super‐resolution power-Doppler imaging. IEEE International Ultrasonic Symposium . IEEE UFFC; Glasgow. 2019-10-07 - 2019-10-09.
Academic lecture

Wigen, Morten Smedsrud; Daae, Annichen Søyland; Grønli, Thomas; Støylen, Asbjørn; Løvstakken, Lasse. (2019) A single recording for quantitative echocardiography - Simultaneous tissue and flow measurements. Myocardial function imaging ; 2019-02-07 - 2019-02-18.
Poster

Østvik, Andreas; Salte, Ivar Mjåland; Smistad, Erik; Løvstakken, Lasse. (2019) Adapting deep learning based motion estimation for myocardial function imaging. IEEE International Ultrasonics Symposium (IUS) . IEEE; Glasgow. 2019-10-06 - 2019-10-09.
Academic lecture

Østvik, Andreas; Smistad, Erik; Løvstakken, Lasse. (2019) Machine learning in Echocardiography. Cardiac Imaging Day . Haukeland universitetssjukehus; Bergen. 2019-10-17 - 2019-10-18.

2018

Poster

Daae, Annichen Søyland; Støylen, Asbjørn; Løvstakken, Lasse; Wigen, Morten Smedsrud. (2018) Initial diastolic vortex formation in the left ventricle relates to the atrioventricular plane motion of the outflow tract. Euro Echo 2018 . EACVI; Milano. 2018-12-05 - 2018-12-08.
Academic lecture

Dietrichson, Fabian Sødal; Smistad, Erik; Østvik, Andreas; Løvstakken, Lasse. (2018) Ultrasound speckle reduction using generative adversial networks. IEEE International Ultrasonics Symposium 2018 . IEEE; Kobe. 2018-10-22 - 2018-10-25.
Academic lecture

Fadnes, Solveig; Salles, Sebastien; Tegnander, Eva; Nyrnes, Siri Ann; Løvstakken, Lasse. (2018) In vivo estimation of myocardial mechanical wave propagation in the fetus. IEEE International Ultrasonics Symposium . IEEE; Kobe. 2018-10-22 - 2018-10-25.
Poster

Fiorito, Adrian Meidell; Østvik, Andreas; Smistad, Erik; Leclerc, Sarah; Bernard, Olivier; Løvstakken, Lasse. (2018) Detection of Cardiac Events in Echocardiography using 3D Convolutional Recurrent Neural Networks. IEEE International Ultrasonics Symposium 2018 . IEEE UFFC; Kobe. 2018-10-22 - 2018-10-25.
Poster

Grønli, Thomas; Wigen, Morten Smedsrud; Segers, Patrick; Løvstakken, Lasse. (2018) A fast 4D B-spline framework for model-based reconstruction and regularization in vector flow imaging. IEEE International Ultrasonics Symposium 2018 . IEEE; Kobe. 2018-10-22 - 2018-10-25.
Academic lecture

Grønli, Thomas; Wigen, Morten Smedsrud; Segers, Patrick; Løvstakken, Lasse. (2018) A fast 4D B-spline framework for model-based reconstruction and regularization in vector flow imaging. IEEE International Ultrasonics Symposium 2018 . IEEE; Kobe. 2018-10-22 - 2018-10-25.
Poster

Leclerc, Sarah; Smistad, Erik; Grenier, Thomas; Lartizien, Carole; Østvik, Andreas; Espinosa, Florian; Jodoin, Pierre-Marc; Løvstakken, Lasse; Bernard, Olivier. (2018) Deep learning applied to multi-structure segmentation in 2D echocardiography: A preliminary investigation of the required database size. IEEE International Ultrasonics Symposium 2018 . IEEE UFFC; Kobe. 2018-10-22 - 2018-10-25.
Academic lecture

Løvstakken, Lasse. (2018) Next generation echocardiography - opportunities and challenges. IEEE International Ultrasonics Symposium . IEEE; Kobe. 2018-10-22 - 2018-10-24.
Academic lecture

Løvstakken, Lasse; Østvik, Andreas; Smistad, Erik. (2018) Machine learning in echocardiography, can we trust it?. EuroEcho ; Milano. 2018-12-05 - 2018-12-08.
Lecture

Mawad, Wadi; Nyrnes, Siri Ann; Fadnes, Solveig; Grønli, Thomas; Mertens, Luc; Løvstakken, Lasse. (2018) cardiac flow dynamics by echocardiography: current and future perspectives. American Society of Echocardiography ; Nashville. 2018-06-25 - 2018-06-25.
Academic lecture

Nyrnes, Siri Ann; Fadnes, Solveig; Salles, Sebastien; Løvstakken, Lasse. (2018) High Frame Rate Imaging. 29th Annual ASE Scientific Sessions . American Society of Echocardiography; Nashville. 2018-06-22 - 2018-06-26.
Interview

Næss, Hans Jørn; Løvstakken, Lasse. (2018) Kunstig intelligens utfordrer legene: Best til å tolke røntgenbildene. Kapital [Fagblad]. 2018-12-10.
Poster

Perrot, Vincent; Avdal, Jørgen; Løvstakken, Lasse; Salles, Sebastien; Vray, Didier; Liebgott, Herve; Ekroll, Ingvild Kinn. (2018) Spatial and Temporal Adaptive FIR Clutter Filtering. IEEE International Ultrasonics symposium 2018 ; 2018-10-23 - 2018-10-25.
Lecture

Salles, Sebastien; Løvstakken, Lasse; Espeland, Torvald; Rodriguez-Molares, Alfonso; Aase, Svein Arne; Støylen, Asbjørn; Torp, Hans. (2018) 4D mechanical wave velocity mapping using clutter filter wave imaging. Healthy Subjects versus patients. IEEE IUS 2018 ; 2018-10-22 - 2018-10-25.
Academic lecture

Smistad, Erik; Østvik, Andreas; Salte, Ivar Mjåland; Leclerc, Sarah; Bernard, Olivier; Løvstakken, Lasse. (2018) Fully automatic real-time ejection fraction and MAPSE measurements in 2D echocardiography using deep neural networks. IEEE International Ultrasonics Symposium 2018 . IEEE; Kobe. 2018-10-22 - 2018-10-25.
Poster

Sælensminde, Magnus; Grønli, Thomas; Segers, Patrick; Nyrnes, Siri Ann; Løvstakken, Lasse. (2018) Intraventricular blood velocity measurements - a comparison between iVFM and blood speckle tracking. IEEE International Ultrasonics Symposium 2018 . IEEE; Kobe. 2018-10-22 - 2018-10-25.
Academic lecture

Wigen, Morten Smedsrud; Salles, Sebastien; Støylen, Asbjørn; Løvstakken, Lasse. (2018) The continuous cardiac thick-slice acquisition - for simultaneous flow and tissue motion estimation. IEEE International Ultrasonics Symposium . IEEE; Kobe. 2018-10-22 - 2018-10-24.
Poster

Østvik, Andreas; Smistad, Erik; Espeland, Torvald; Berg, Erik Andreas Rye; Løvstakken, Lasse. (2018) Automatic Myocardial Strain Imaging in Echocardiography Using Deep Learning. MICCAI 2018, 4th Workshop on Deep Learning in Medical Image Analysis (DLMIA) ; Granada. 2018-09-16 - 2018-09-20.
Academic lecture

Østvik, Andreas; Smistad, Erik; Espeland, Torvald; Berg, Erik Andreas Rye; Løvstakken, Lasse. (2018) Automatic functional imaging in echocardiography using deep learning based segmentation and flow estimation. IEEE International Ultrasonics Symposium 2018 . IEEE UFFC; Kobe. 2018-10-22 - 2018-10-25.
Academic lecture

Østvik, Andreas; Smistad, Erik; Løvstakken, Lasse. (2018) Deep learning for ultrasound image classification and segmentation. Myocardial velocity and deformation imaging ; Leuven. 2018-02-08 - 2018-02-09.

2017

Academic lecture

Ekroll, Ingvild Kinn; Avdal, Jørgen; Salles, Sebastien; Fadnes, Solveig; Rodriguez-Molares, Alfonso; Løvstakken, Lasse. (2017) Quantitative ultrasound imaging (at NTNU) - cardiovascular applications. 2017 Workshop on cardiovascular applications of medical ultrasound imaging ; 2017-12-07 - 2017-12-07.
Academic lecture

Fadnes, Solveig; Tegnander, Eva; Nyrnes, Siri Ann; Løvstakken, Lasse. (2017) Vector flow imaging of fetal circulation - an in vivo study. The Artimino Conference on Medical Ultrasound Technology ; Artimino. 2017-06-11 - 2017-06-14.
Academic lecture

Fadnes, Solveig; Tegnander, Eva; Nyrnes, Siri Ann; Løvstakken, Lasse. (2017) Vector flow imaging of fetal circulation using diverging waves. 2017 IEEE International Ultrasonics Symposium ; Washington D.C.. 2017-09-06 - 2017-09-09.
Lecture

Fadnes, Solveig; Wigen, Morten Smedsrud; Grønli, Thomas; Nyrnes, Siri Ann; Løvstakken, Lasse. (2017) Cardiac vector flow imaging. Myocardial Velocity & Deformation Imaging . KU Leuven; Leuven. 2017-02-09 - 2017-02-10.
Academic lecture

Grønli, Thomas; Løvstakken, Lasse. (2017) Modeling and data assimilation for improved blood velocity estimates. The Artimino Conference on Medical Ultrasound Technology ; Artimino. 2017-06-11 - 2017-06-14.
Poster

Grønli, Thomas; Swillens, Abigail; Segers, Patrick; Løvstakken, Lasse. (2017) Real-time Assimilation and Regularization of Ultrasound Blood Velocity Measurements Using Smoothed Particle Hydrodynamics. 2017 IEEE International Ultrasonics Symposium . IEEE; Washington, D.C. 2017-09-06 - 2017-09-09.
Academic lecture

Løvstakken, Lasse. (2017) Ultrafast ultrasound blood flow imaging - current and future perspectives. SPIE medical imaging ; 2017-02-14 - 2017-02-16.
Academic lecture

Mawad, Wadi; Løvstakken, Lasse; Fadnes, Solveig; Mertens, Luc; Nyrnes, Siri Ann. (2017) Right ventricular flow dynamics in dilated right ventricles. Energy loss estimation based on blood speckle tracking echocardiography in children. ASE 2017 . American Society of Echocardiography; Baltimore. 2017-06-02 - 2017-06-06.
Lecture

Mertens, Luc; Nyrnes, Siri Ann; Løvstakken, Lasse. (2017) Blood Speckle Imaging - Initial experience in children. ASE 2017 . American Society of Echocardiography; Baltimore. 2017-06-02 - 2017-06-06.
Academic lecture

Nyrnes, Siri Ann; Fadnes, Solveig; Mertens, Luc; Løvstakken, Lasse. (2017) Blood Speckle Tracking - New insight to Pediatric Cardiology?. ASE 2017 . American Society of Echocardiography; Baltimore. 2017-06-02 - 2017-06-06.
Lecture

Salles, Sebastien; Løvstakken, Lasse. (2017) 3D myocardial mechanical wave measurements using high frame rate ultrasound imaging and Clutter filter wave imaging: towards a 3D myocardial elasticity mapping. IEEE Ultrasonics Symposium 2017 ; 2017-09-06 - 2017-09-09.
Poster

Salles, Sebastien; Løvstakken, Lasse; Torp, Hans. (2017) Clutter filter wave imaging (CFWI): a new way to visualize and detect mechanical waves propagation. IEEE Ultrasonics Symposium 2017 ; 2017-09-06.
Poster

Smistad, Erik; Østvik, Andreas; Haugen, Bjørn Olav; Løvstakken, Lasse. (2017) 2D Left ventricle segmentation using deep learning. International Ultrasonics Symposium (IUS) ; Washington DC. 2017-09-06 - 2017-09-09.
Academic lecture

Wigen, Morten Smedsrud; Løvstakken, Lasse. (2017) 4D cardiac vector flow imaging. The Artimino Conference on Medical Ultrasound Technology ; Artimino. 2017-06-11 - 2017-06-14.
Academic lecture

Wigen, Morten Smedsrud; Rodriguez-Molares, Alfonso; Bjåstad, Tore Grüner; Eriksen, Marius; STENSÆTH, KNUT HAAKON; Løvstakken, Lasse. (2017) In-Vivo 3D Cardiac Vector Flow Imaging – a Comparison Between Ultrasound and Phase-Contrast MRI. 2017 IEEE International Ultrasonics Symposium . IEEE; Washington D.C.. 2017-09-06 - 2017-09-09.
Poster

Østvik, Andreas; Smistad, Erik; Aase, Svein Arne; Haugen, Bjørn Olav; Løvstakken, Lasse. (2017) Real-Time Classification of Standard Cardiac Views in Echocardiography using Neural Networks. IEEE International Ultrasonics Symposium ; Washington DC. 2017-09-06 - 2017-09-09.

2016

Poster

Avdal, Jørgen; Ekroll, Ingvild Kinn; Løvstakken, Lasse; Torp, Hans Garman. (2016) Combined 2D Vector and Tracking Doppler for improved blood flow quantification. International ultrasonics symposium ; 2016-09-18 - 2016-09-21.
Popular scientific lecture

Ekroll, Ingvild Kinn; Iversen, Daniel Høyer; Wigen, Morten Smedsrud; Khan, Naiad Hossain; Prieur, Fabrice Jean Gabriel; Løvstakken, Lasse; Håberg, Asta. (2016) Presentation of some CIUS projects. Technoport 2016 ; 2016-03-08 - 2016-03-09.
Academic lecture

Fadnes, Solveig; Nyrnes, Siri Ann; Wigen, Morten Smedsrud; Tegnander, Eva; Løvstakken, Lasse. (2016) Detailed flow visualization in fetal and neonatal hearts using 2-D speckle tracking. IEEE International Ultrasonics Symposium ; 2016-09-18 - 2016-09-21.
Academic lecture

Grønli, Thomas; Smistad, Erik; Nyrnes, Siri Ann; Gomez, Alberto; Løvstakken, Lasse. (2016) Reconstruction of In Vivo Flow Velocity Fields Based On a Rapid Ultrasound Image Segmentationand B-spline Regularization Framework. IEEE International Ultrasonics Symposium ; 2016-09-18 - 2016-09-21.
Academic lecture

Høgenes, Jakob; Wigen, Morten Smedsrud; Nyrnes, Siri Ann; Segers, Patrick; Swillens, Abigail; Løvstakken, Lasse. (2016) Model-based estimation of intra-cardiac blood flow velocities using an unscented Kalman filter. IEEE International Ultrasonics Symposium ; 2016-09-18 - 2016-09-21.
Lecture

Karabiyik, Yucel; Avdal, Jørgen; Ekroll, Ingvild Kinn; Torp, Hans; Løvstakken, Lasse. (2016) Data Adaptive 2-D Tracking Doppler. IEEE International Ultrasonics symposium ; 2016-09-21 - 2016-09-21.
Academic lecture

Løvstakken, Lasse. (2016) 3D cardiac flow imaging - towards ultrafast. IEEE Symposium on Biomedical Imaging (ISBI) ; Praha. 2016-04-13 - 2016-04-16.
Academic lecture

Wigen, Morten Smedsrud; Løvstakken, Lasse. (2016) 1In vivo three-dimensional intra-cardiac vector flow imaging using a 2D matrix array transducer. IEEE International Ultrasonics Symposium ; 2016-09-18 - 2016-09-21.

2015

Poster

Ekroll, Ingvild Kinn; Avdal, Jørgen; Swillens, Abigail Emily; Torp, Hans; Løvstakken, Lasse. (2015) Multi-angle imaging for robust vector Doppler and coherent compounding. IEEE International Ultrasonics symposium ; 2015-10-21 - 2015-10-24.
Academic lecture

Fadnes, Solveig; Nyrnes, Siri Ann; Løvstakken, Lasse. (2015) Plane wave imaging of congenital heart defects from fetal to newborn stage. Artimino ; 2015-06-07 - 2015-06-10.
Academic lecture

Iversen, Daniel Høyer; Lindseth, Frank; Unsgård, Geirmund; Torp, Hans; Løvstakken, Lasse. (2015) Improved quality of freehand 3-D ultrasound color flow imaging by multi-angle compounding. IEEE International Ultrasonics symposium ; 2015-10-21 - 2015-10-24.
Academic lecture

Løvstakken, Lasse. (2015) Ultrasound imaging and quantification of cardiovascular disease - Present and future perspectives. 6th Seminar on Exercise in Medicine . NTNU; Trondheim. 2015-12-17 - 2015-12-18.
Academic lecture

Løvstakken, Lasse; Fadnes, Solveig; Nyrnes, Siri Ann. (2015) Flow mapping in congenital heart disease. 10th European Echocardiography Course on Congenital Heart Disease ; Leuven. 2015-10-14 - 2015-10-17.
Academic lecture

Løvstakken, Lasse; Nyrnes, Siri Ann. (2015) Contrast-less, angle-independent flow mapping in the neonate and fetal circulation – technical insight and clinical examples. Myocardial Velocity & Deformation Imaging ; 2015-02-05 - 2015-02-06.
Lecture

Løvstakken, Lasse; Nyrnes, Siri Ann. (2015) Nye ultralydbilder av blodstrøm kan gi bedre forståelse av hjertesykdom. Fredagsforelesning ved St. Olavs Hospital . St. Olavs Hospital og Det medisinske fakultet NTNU; Trondheim. 2015-04-17 - 2015-04-17.
Academic lecture

Løvstakken, Lasse; Wigen, Morten Smedsrud; Fadnes, Solveig; Nyrnes, Siri Ann. (2015) 3D Cardiac Flow Imaging. Artimino ; 2015-06-07 - 2015-06-10.
Academic lecture

Nyrnes, Siri Ann; Løvstakken, Lasse. (2015) Flow speckle tracking provides new information of complex blood flow in congenital heart disease. 49th Annual Meeting of the Association for European Paediatric and Congenital Cardiology, AEPC . Assoc. for European Paediatric and Congenital Cardiology; Prague. 2015-05-20 - 2015-05-23.
Academic lecture

Nyrnes, Siri Ann; Løvstakken, Lasse. (2015) Kan ny ultralydteknologi gi økt kunnskap om barnehjerter?. Fredagsforelesning ved St. Olavs Hospital . St. Olavs Hospital og Det medisinske fakultet NTNU; Trondheim. 2015-10-30 - 2015-10-30.
Lecture

Rodriguez-Molares, Alfonso; Løvstakken, Lasse; Denarie, Bastien; Torp, Hans. (2015) Busting the ghost in coherent plane-wave imaging. IEEE International Ultrasonics Symposium 2015 ; Taipei. 2015-10-21 - 2015-10-24.
Academic lecture

Wigen, Morten Smedsrud; Fadnes, Solveig; Løvstakken, Lasse. (2015) 3D vector flow imaging. Artimino ; 2015-06-07 - 2015-06-10.

2014

Interview

Hernes, Toril A. Nagelhus; Løvstakken, Lasse; Måsøy, Svein-Erik; Torp, Hans. (2014) Jubler over forskningsseier i Trondheim. Adresseavisen [Avis]. 2014-11-21.
Poster

Kiss, Gabriel; Iversen, Daniel Høyer; Standal, Øyvind Krøvel-Velle; Rau, Jochen; Torp, Hans; Løvstakken, Lasse; Måsøy, Svein-Erik. (2014) A visualization tool for improved assessment and follow-up with ultrasound. IEEE Ultrasonics Symposium ; Chicago. 2014-09-03 - 2014-09-06.
Interview

Løvstakken, Lasse. (2014) New way of visualizing young hearts can save lives. Science Nordic [Internett]. 2014-08-28.
Interview

Løvstakken, Lasse. (2014) Ny ultralydmetode testes på spedbarn. NRK midtnytt [TV]. 2014-08-19.
Interview

Løvstakken, Lasse. (2014) Ny ultralydteknologi kan redde flere liv. NRK [Internett]. 2014-08-19.
Lecture

Løvstakken, Lasse. (2014) State-of-the-art ultrasound blood flow imaging. Medviz seminar . Universitetet i Bergen; Bergen. 2014-03-07 - 2014-03-07.
Academic lecture

Løvstakken, Lasse. (2014) Ultrasound Imaging of the Heart at Very High Frame Rates. IEEE International Symposium on Biomedical Imaging . IEEE; Beijing. 2014-04-29 - 2014-05-02.
Interview

Løvstakken, Lasse; Nyrnes, Siri Ann; Toftaker, Jøte. (2014) Ny ultralydteknologi kan redde liv. NRK Dagsrevyen [TV]. 2014-08-19.
Interview

Midling, Anne Sliper; Løvstakken, Lasse; Nyrnes, Siri Ann. (2014) Bruker ultralyd for å finne feil i barnehjertet. Forskning.no [Internett]. 2014-08-21.
Interview

Midling, Anne Sliper; Løvstakken, Lasse; Nyrnes, Siri Ann. (2014) Lager værvarsel for barnehjertet. Adressa.no [Internett]. 2014-08-21.
Interview

Midling, Anne Sliper; Løvstakken, Lasse; Nyrnes, Siri Ann. (2014) Lager værvarsel for barnehjertet. Gemini.no [Internett]. 2014-08-20.
Interview

Sørland, Kaia; Løvstakken, Lasse. (2014) Stjerneforskning i startfasen. Dusken.no [Internett]. 2014-09-30.
Interview

Sørland, Kaia; Løvstakken, Lasse. (2014) Stjerneforskning i startfasen. Under Dusken [Avis]. 2014-09-30.

2013

Poster

Denarie, Bastien; Tangen, Thor Andreas; Ekroll, Ingvild Kinn; Rolim, Natale Pinheiro Lage; Torp, Hans; Bjåstad, Tore; Løvstakken, Lasse. (2013) Coherent plane wave compounding for very high frame rate ultrasonography of rapidly moving targets. 5th National PhD Conference in Medical Imaging . Medim; Trømsø. 2013-10-03 - 2013-10-04.
Academic lecture

Løvstakken, Lasse. (2013) Vortex Flow Imaging in Pediatric Heart Disease. Scientific sessions of the American Soceity of Echocardiography ; 2013-06-29 - 2013-07-04.
Interview

Nyrnes, Siri Ann; Fadnes, Solveig; Løvstakken, Lasse. (2013) Bedre diagnose for hjertebarn. TV2 Lørdagsmagasinet og TV2 Nyhetene [TV]. 2013-03-30.
Interview

Nyrnes, Siri Ann; Løvstakken, Lasse. (2013) Hjertebank på torget. VG - Bilag: "Forskningsdagene" [Avis]. 2013-09-17.
Poster

Nyrnes, Siri Ann; Løvstakken, Lasse; Døhlen, Gaute; Skogvoll, Eirik; Torp, Hans; Skjærpe, Terje; Norgård, Gunnar; Samstad, Stein; Graven, Torbjørn; Haugen, Bjørn Olav. (2013) Transesophageal echocardiography with Blood Flow Imaging during Atrial Septal Defect closure: A comparison with the current references. AEPC 2013 . Association for European Paediatric and Congenital Cardiol.; London. 2013-05-22 - 2013-05-25.
Poster

Vallee, Emilie Claire Yvonne; Ekroll, Ingvild Kinn; Denarie, Bastien; Løvstakken, Lasse; Håberg, Asta. (2013) Localizing brain activity with functional Ultrasound Imaging: a comparison with fMRI. 5th National PhD conference in Medical Imaging ; 2013-10-02 - 2013-10-03.

2012

Academic lecture

Ekroll, Ingvild Kinn; Dahl, Torbjørn; Torp, Hans; Løvstakken, Lasse. (2012) In vivo Vector Flow Imaging With Retrospective Pulsed Wave Doppler. IEEE, International ultrasonics symposium 2012 ; 2012-10-07 - 2012-10-10.
Academic lecture

Fadnes, Solveig; Nyrnes, Siri Ann; Swillens, Abigail; Torp, Hans; Løvstakken, Lasse. (2012) Shunt quantification in congenital heart disease based on two-dimensional speckle tracking. 4th PhD Conference in Medical Imaging . MedIm – Norwegian Research School in Medical Imaging; Trondheim. 2012-11-28 - 2012-11-29.
Academic lecture

Fadnes, Solveig; Nyrnes, Siri Ann; Swillens, Abigail; Torp, Hans; Løvstakken, Lasse. (2012) Shunt quantification in congenital heart disease based on two-dimensional speckle tracking. 2012 IEEE International Ultrasonics Symposium . IEEE IUS; Dresden. 2012-10-07 - 2012-10-10.
Poster

Fadnes, Solveig; Nyrnes, Siri Ann; Swillens, Abigail; Torp, Hans; Løvstakken, Lasse. (2012) Shunt quantification in congenital heart disease based on two-dimensional speckle tracking. 2012 IEEE International Ultrasonics Symposium . IEEE IUS; Dresden. 2012-10-07 - 2012-10-10.
Poster

Fredriksen, Tonje Dobrowen; Ekroll, Ingvild Kinn; Løvstakken, Lasse; Torp, Hans. (2012) 2D Tracking Doppler: A New Method to Limit Spectral Broadening in Pulsed Wave Doppler. IEEE Ultrasonics Symposium ; 2012-10-07 - 2012-10-10.
Poster

Iversen, Daniel Høyer; Lindseth, Frank; Torp, Hans; Løvstakken, Lasse. (2012) Improved 3-D reconstruction of vascular flow based on plane wave imaging. IEEE ultrasonics conference ; 2012-10-07 - 2012-10-09.
Academic lecture

Iversen, Daniel Høyer; Lindseth, Frank; Unsgård, Geirmund; Torp, Hans; Løvstakken, Lasse. (2012) Model-based correction of angle-dependencies in navigated 3-D flow imaging during neurosurgical interventions. Nansen Neuroscience Network meeting ; 2012-05-29 - 2012-05-29.
Academic lecture

Løvstakken, Lasse. (2012) 2-D blood flow analysis without Doppler. Myocardial velocity and deformation imaging ; 2012-02-09 - 2012-02-10.

2011

Academic lecture

Alnes, Solveig Søvik; Løvstakken, Lasse. (2011) Biomechanical simulation and multi-dimensional flow imaging of cardiac flow. The 2nd National PhD conference in Medical Imaging and the Annual MedViz conference ; Bergen. 2011-01-17 - 2011-01-18.
Academic lecture

Alnes, Solveig Søvik; Løvstakken, Lasse. (2011) Multi-dimensional flow quantification of cardiac flow patterns. The Artimino Conference on Medical Ultrasound Technology ; Artimino. 2011-06-26 - 2011-06-29.
Poster

Alnes, Solveig Søvik; Swillens, Abigail; Segers, Patrick; Torp, Hans; Løvstakken, Lasse. (2011) Clutter filtering issues in speckle tracking for two-dimensional blood velocity estimation. IEEE International Ultrasonics Symposium 2011 . IEEE; Orlando. 2011-10-18 - 2011-10-21.
Poster

Denarie, Bastien; Bakstad, Ole Jørgen; Løvstakken, Lasse; Bjåstad, Tore; Torp, Hans. (2011) FieldSim3: a unified ultrasound simulation platform. 3rd National PhD Conference in Medical Imaging ; 2011-11-21 - 2011-11-22.
Academic lecture

Ekroll, Ingvild Kinn; Løvstakken, Lasse; Torp, Hans. (2011) Improved spectral Doppler in medical ultrasound based on spatiotemporal adaptive signal processing. 2011 Joint National Ph.D. Conference in Medical Imaging and MedViz Conference ; 2011-01-17 - 2011-01-18.
Poster

Ekroll, Ingvild Kinn; Swillens, Abigail; Segers, Patrick; Torp, Hans; Løvstakken, Lasse. (2011) Simultanous quantification of flow and tissue velocities based on multi-angle plane wave imaging with extended velocity range. IEEE International Ultrasonics Symposium 2011 (IUS 2011) ; 2011-10-17 - 2011-10-21.
Academic lecture

Iversen, Daniel Høyer; Lindseth, Frank; Unsgård, Geirmund; Torp, Hans; Løvstakken, Lasse. (2011) 3-D flow imaging in neurosurgery -Improved flow detection and quantification of neurovascular flow. Medical Imaging Medical Imaging ; Oslo. 2011-11-21 - 2011-11-22.
Poster

Iversen, Daniel Høyer; Lindseth, Frank; Unsgård, Geirmund; Torp, Hans; Løvstakken, Lasse. (2011) Model-based correction of angle-dependencies in navigated3-D flow imaging during neurosurgical interventions. IEEE ultrasonics conference 2011 ; Orlando. 2011-10-18 - 2011-10-21.
Academic lecture

Løvstakken, Lasse. (2011) High frame rate color-Doppler imaging - flow patterns without contrast. Myocardial velocity and deformation imaging . Katholeike Universiteit Leuven; Leuven. 2011-02-10 - 2011-02-11.
Academic lecture

Løvstakken, Lasse. (2011) Teknikker innen Doppleravbildning. Årsmøte for norsk forening for ultralyddiagnostikk . Norsk forening for ultralyddiagnostikk; Trondheim. 2011-03-30 - 2011-04-04.
Academic lecture

Løvstakken, Lasse; Nyrnes, Siri Ann; Haugen, Bjørn Olav; Torp, Hans. (2011) Angle-independent quantification of complex flow patterns in congenital heart disease. IEEE International Ultrasonics Symposium ; Orlando. 2011-10-18 - 2011-10-21.
Academic lecture

Løvstakken, Lasse; Nyrnes, Siri Ann; Haugen, Bjørn Olav; Torp, Hans. (2011) Latest technology for 2D blood flow analysis. Euroecho & other Imaging Modalities ; Budapest. 2011-12-07 - 2011-12-10.
Interview

Nyrnes, Siri Ann; Løvstakken, Lasse. (2011) New Hope for Tiny Hearts. ScienceDaily [Internett]. 2011-04-04.
Interview

Nyrnes, Siri Ann; Løvstakken, Lasse; Haraldseth, Olav. (2011) Norwegian Research Centre Offers Hope For Tiny Hearts. Medical News Today [Internett]. 2011-03-17.
Interview

Nyrnes, Siri Ann; Løvstakken, Lasse; Haraldseth, Olav. (2011) Norwegian Research Centre Offers Hope For Tiny Hearts. eBioNews [Internett]. 2011-03-17.
Interview

Nyrnes, Siri Ann; Løvstakken, Lasse; Haraldseth, Olav. (2011) Norwegian Research Centre Offers Hope For Tiny Hearts. MediLexicon [Internett]. 2011-03-17.
Interview

Nyrnes, Siri Ann; Løvstakken, Lasse; Haraldseth, Olav. (2011) Norwegian research centre offers hope for tiny hearts. Scientific Computing [Internett]. 2011-04-04.
Interview

Nyrnes, Siri Ann; Løvstakken, Lasse; Skogvoll, Eirik; Torp, Hans; Haugen, Bjørn Olav. (2011) Kan redde flere nyfødte med hjertefeil. NRK [Internett]. 2011-01-05.
Interview

Nyrnes, Siri Ann; Løvstakken, Lasse; Skogvoll, Eirik; Torp, Hans; Haugen, Bjørn Olav. (2011) Kan redde nyfødte med hjertefeil. Forskning.no [Internett]. 2011-01-05.
Interview

Nyrnes, Siri Ann; Løvstakken, Lasse; Skogvoll, Eirik; Torp, Hans; Haugen, Bjørn Olav. (2011) Lettere å finne hjertefeil. Barnehage.no - Nyheter [Internett]. 2011-01-05.
Poster

Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2011) Change in left ventricular vortex flow before and after surgery for coarctation of the aorta in an infant shown with plane wave imaging and flow speckle tracking. 45th Annual Meeting Association for European Paediatric Cardiology . AEPC; Granada. 2011-05-18 - 2011-05-21.
Poster

Nyrnes, Siri Ann; Løvstakken, Lasse; Torp, Hans; Haugen, Bjørn Olav. (2011) Flow speckle tracking for detailed visualization of flow patterns in neonates with congenital heart defects. Euroecho & other Imaging Modalities 2011 . European association of echocardiography; Budapest. 2011-12-07.

2010

Academic lecture

Nordgaard, Håvard B.; Swillens, Abigail Emily; Nordhaug, Dag Ole; Kirkeby-Garstad, Idar; Van Loo, D.; Vitale, Nicola; Segers, Patrick; Haaverstad, Rune; Løvstakken, Lasse. (2010) Impact of competitive flow on wall shear stress in coronary surgery: Computational fluid dynamics of a LIMA-LAD anastomosis in a porcine model. Biomechanics in vascular biology and cardiovascular disease . Erasmus MC; Rotterdam. 2010-04-15 - 2010-04-16.
Academic lecture

Løvstakken, Lasse. (2010) Angle-independent flow imaging using plane-waves and parallel receive beamforming. International Conference of the Society for Medical Innovation and Technology . Society for Medical Innovation and Technology; Trondheim. 2010-09-02 - 2010-09-04.
Academic lecture

Løvstakken, Lasse. (2010) Ny teknologi - ultralyd måler blo

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