Johanna Vannesjo

About

I work on methods development for Magnetic Resonance Imaging (MRI), with a particular focus on ultra-high field (7 Tesla) MRI of the spinal cord. Spinal cord MRI is affected by various perturbations to the magnetic fields that perform the spatial encoding of signal in MRI, sometimes drastically reducing the image quality. I look at characterizing the spatial and temporal characteristics of the magnetic field perturbations, which mostly are of physiological origin (e.g. breathing, static susceptibility), and develop methods to correct for them. This includes gradient system characterization, dynamic shimming and retrospective/prospective methods for addressing dynamic B0 field fluctuations. The goal is to achieve robust, high-resolution, high-quality, structural and functional images of the spinal cord.

Publications

2022

Cohen-Adad, Julien; Alonso-Ortiz, Eva; Alley, Stephanie; Lagana, Maria Marcella; Baglio, Francesca; Vannesjo, Johanna; Karbasforoushan, Haleh; Seif, Maryam; Seifert, Alan C.; Xu, Junqian; Kim, Joo-Won; Labounek, René; Vojtíšek, Lubomír; Dostál, Marek; Valošek, Jan; Samson, Rebecca S.; Grussu, Francesco; Battiston, Marco; Gandini Wheeler-Kingshott, Claudia A. M.. (2022) Comparison of multicenter MRI protocols for visualizing the spinal cord gray matter. Magnetic Resonance in Medicine. volum 88 (2).
Academic article
Kaptan, Merve; Vannesjo, Johanna; Mildner, Toralf; Horn, Ulrike; Hartley-Davies, Ronald; Oliva, Valeria; Brooks, Jonathan C. W.; Weiskopf, Nikolaus; Finsterbusch, Jürgen; Eippert, Falk. (2022) Automated slice-specific z-shimming for functional magnetic resonance imaging of the human spinal cord. Human Brain Mapping. volum 43 (18).
Academic article
Nagy, Zoltan; Hutton, Chloe; David, Gergely; Hinterholzer, Natalie; Deichmann, Ralf; Weiskopf, Nikolaus; Vannesjo, Johanna. (2022) HiHi fMRI: a data-reordering method for measuring the hemodynamic response of the brain with high temporal resolution and high SNR. Cerebral Cortex. volum 33 (8).
Academic article

2021

Graedel, Nadine N; Kasper, Lars; Engel, Maria; Nussbaum, Jennifer; Wilm, Bertram J; Pruessmann, Klaas P; Vannesjo, S Johanna. (2021) Feasibility of spiral fMRI based on an LTI gradient model. NeuroImage. volum 245.
Academic article
Shi, Yuhang; Clare, Stuart; Vannesjo, S Johanna. (2021) Shim optimization with region of interest-specific Tikhonov regularization: Application to second-order slice-wise shimming of the brain. Magnetic Resonance in Medicine. volum 87 (3).
Academic article

Journal publications

Cohen-Adad, Julien; Alonso-Ortiz, Eva; Alley, Stephanie; Lagana, Maria Marcella; Baglio, Francesca; Vannesjo, Johanna; Karbasforoushan, Haleh; Seif, Maryam; Seifert, Alan C.; Xu, Junqian; Kim, Joo-Won; Labounek, René; Vojtíšek, Lubomír; Dostál, Marek; Valošek, Jan; Samson, Rebecca S.; Grussu, Francesco; Battiston, Marco; Gandini Wheeler-Kingshott, Claudia A. M.. (2022) Comparison of multicenter MRI protocols for visualizing the spinal cord gray matter. Magnetic Resonance in Medicine. volum 88 (2).
Academic article
Kaptan, Merve; Vannesjo, Johanna; Mildner, Toralf; Horn, Ulrike; Hartley-Davies, Ronald; Oliva, Valeria; Brooks, Jonathan C. W.; Weiskopf, Nikolaus; Finsterbusch, Jürgen; Eippert, Falk. (2022) Automated slice-specific z-shimming for functional magnetic resonance imaging of the human spinal cord. Human Brain Mapping. volum 43 (18).
Academic article
Nagy, Zoltan; Hutton, Chloe; David, Gergely; Hinterholzer, Natalie; Deichmann, Ralf; Weiskopf, Nikolaus; Vannesjo, Johanna. (2022) HiHi fMRI: a data-reordering method for measuring the hemodynamic response of the brain with high temporal resolution and high SNR. Cerebral Cortex. volum 33 (8).
Academic article
Graedel, Nadine N; Kasper, Lars; Engel, Maria; Nussbaum, Jennifer; Wilm, Bertram J; Pruessmann, Klaas P; Vannesjo, S Johanna. (2021) Feasibility of spiral fMRI based on an LTI gradient model. NeuroImage. volum 245.
Academic article
Shi, Yuhang; Clare, Stuart; Vannesjo, S Johanna. (2021) Shim optimization with region of interest-specific Tikhonov regularization: Application to second-order slice-wise shimming of the brain. Magnetic Resonance in Medicine. volum 87 (3).
Academic article

Språkvelger