Difference between revisions of "Projects/Diffusion/2007 Project Week EPI Distortion correction using field maps"
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| − | + | EPI data collected for DTI and fMRI analysis are spatially distorted, due to susceptibility/chemical shift artifacts. Our VCFS pilot data have been collected using parallel imaging, which reduces distortions, but does not eliminate them. Artifacts' locations depend on encoding directions, we see them in the inferior temporal and inferior frontal brain regions. As suggested by Bruce Fischl at the last Core1 meeting, we collected field maps to calculate distortions, which information could be then used to "undistort" images. | |
Revision as of 23:21, 23 June 2007
Home < Projects < Diffusion < 2007 Project Week EPI Distortion correction using field mapsKey Investigators
- BWH: Marek Kubicki
- Anyone else who is interesting in helping
Objective
EPI data collected for DTI and fMRI analysis are spatially distorted, due to susceptibility/chemical shift artifacts. Our VCFS pilot data have been collected using parallel imaging, which reduces distortions, but does not eliminate them. Artifacts' locations depend on encoding directions, we see them in the inferior temporal and inferior frontal brain regions. As suggested by Bruce Fischl at the last Core1 meeting, we collected field maps to calculate distortions, which information could be then used to "undistort" images.
