I am trying to analyze DWI data without any means to correct susceptibility-induced distortion (no field map, no inverse phase-ecndoing). I hope "eddy" outperforms "eddy_correct", but the "eddy" does not run without "acquisition parameters" and "index".
I thought I could run it with just a [1x4] vector (for one phase-encoding) in the "acquisition parameter file" and all 1's (as many as the number of volumes) in the "index file", but it returns
exceptions:
$ eddy --imain=dwi.nii --mask=brain_mask.nii --bvecs=bvecs --bvals=bvals --out=data --acqp=acqp --index=index
terminate called after throwing an instance of 'EDDY::EddyException'what(): pǙ;Aborted
Could anyone please share a tip on this issue?
Best regards,--
Seung-Goo KimDoctor of Natural Science in Psychology
Research Group for Cortical Networks and Cognitive Functions,
Max Planck Institute for Human Cognitive and Brain Sciences,
Stephanstrasse 1A, 04103 Leipzig, Germany.
Phone: +49 341 9940 2618 | Fax: +49 341 9940 2624
http://www.cbs.mpg.de/~skim