Signe Johanna Vannesjö

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

2023

Schmidt, Tim; Vannesjo, S. Johanna; Sommer, Stefan; Nagy, Zoltán. (2023) fMRI with whole-brain coverage, 75-ms temporal resolution and high SNR by combining HiHi reshuffling and multiband imaging. Magnetic Resonance Imaging
Academic article
Kaptan, Merve; Horn, Ulrike; Vannesjo, S. Johanna; Mildner, Toralf; Weiskopf, Nikolaus; Finsterbusch, Jürgen. (2023) Reliability of resting-state functional connectivity in the human spinal cord: Assessing the impact of distinct noise sources. NeuroImage
Academic article

2022

Kaptan, Merve; Vannesjo, Johanna; Mildner, Toralf; Horn, Ulrike; Hartley-Davies, Ronald; Oliva, Valeria. (2022) Automated slice-specific z-shimming for functional magnetic resonance imaging of the human spinal cord. Human Brain Mapping
Academic article
Cohen-Adad, Julien; Alonso-Ortiz, Eva; Alley, Stephanie; Lagana, Maria Marcella; Baglio, Francesca; Vannesjo, Johanna. (2022) Comparison of multicenter MRI protocols for visualizing the spinal cord gray matter. Magnetic Resonance in Medicine
Academic article
Nagy, Zoltan; Hutton, Chloe; David, Gergely; Hinterholzer, Natalie; Deichmann, Ralf; Weiskopf, Nikolaus. (2022) HiHi fMRI: a data-reordering method for measuring the hemodynamic response of the brain with high temporal resolution and high SNR. Cerebral Cortex
Academic article

2021

Graedel, Nadine N; Kasper, Lars; Engel, Maria; Nussbaum, Jennifer; Wilm, Bertram J; Pruessmann, Klaas P. (2021) Feasibility of spiral fMRI based on an LTI gradient model. NeuroImage
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
Academic article

Journal publications

Schmidt, Tim; Vannesjo, S. Johanna; Sommer, Stefan; Nagy, Zoltán. (2023) fMRI with whole-brain coverage, 75-ms temporal resolution and high SNR by combining HiHi reshuffling and multiband imaging. Magnetic Resonance Imaging
Academic article
Kaptan, Merve; Horn, Ulrike; Vannesjo, S. Johanna; Mildner, Toralf; Weiskopf, Nikolaus; Finsterbusch, Jürgen. (2023) Reliability of resting-state functional connectivity in the human spinal cord: Assessing the impact of distinct noise sources. NeuroImage
Academic article
Kaptan, Merve; Vannesjo, Johanna; Mildner, Toralf; Horn, Ulrike; Hartley-Davies, Ronald; Oliva, Valeria. (2022) Automated slice-specific z-shimming for functional magnetic resonance imaging of the human spinal cord. Human Brain Mapping
Academic article
Cohen-Adad, Julien; Alonso-Ortiz, Eva; Alley, Stephanie; Lagana, Maria Marcella; Baglio, Francesca; Vannesjo, Johanna. (2022) Comparison of multicenter MRI protocols for visualizing the spinal cord gray matter. Magnetic Resonance in Medicine
Academic article
Nagy, Zoltan; Hutton, Chloe; David, Gergely; Hinterholzer, Natalie; Deichmann, Ralf; Weiskopf, Nikolaus. (2022) HiHi fMRI: a data-reordering method for measuring the hemodynamic response of the brain with high temporal resolution and high SNR. Cerebral Cortex
Academic article
Graedel, Nadine N; Kasper, Lars; Engel, Maria; Nussbaum, Jennifer; Wilm, Bertram J; Pruessmann, Klaas P. (2021) Feasibility of spiral fMRI based on an LTI gradient model. NeuroImage
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
Academic article

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