I would like to use "realign and unwarp" in SPM5 using a VDM file.
1. From our physicists, I received a map which describes the
A-P-distortions in voxels. This map is aligned with the EPI scans, but
undistorted. Can I use this map as a VDM in "realign and unwarp"? Or do
I need to pre-process my A-P-distortion map somehow?
(I don't have the original fieldmap for using the fieldmap toolbox.)
2. When I specify my VDM file in analyze (img/hdr) format, the the
result looks plausible. However, if I use the *same* VDM file in the
nifti data format (*.nii), the result looks strange (see screenshot). Is
it required to have the VDM file in *analyze* format?
Thank you very much for your suggestions.
With best wishes,