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Distortion-Corrected High Resolution Zoomed fMRI at 9.4 T

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Bause,  J
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Ehses,  P
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Shajan,  G
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Pohmann,  R
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Scheffler,  K
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Bause, J., In, M.-H., Ehses, P., Shajan, G., Speck, O., Pohmann, R., et al. (2015). Distortion-Corrected High Resolution Zoomed fMRI at 9.4 T. Poster presented at 23rd Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2015), Toronto, Canada.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002A-45DB-7
Abstract
High-resolution EPI at ultra-high field often suffers from distortions and requires a short time to k-space center in order to achieve the optimal BOLD contrast. In this work, zoomed functional imaging was combined with the point spread function mapping technique in order to obtain images with re-duced distortions acquired with the optimal TE for fMRI at 9.4T. The approach was tested in a functional experiment with 0.8 mm and 0.65 mm iso-tropic resolution. Activation maps obtained from the distortion corrected images showed a higher number of activated voxels then the maps from the undistorted images and match well with anatomy.