Dear all,
The script "epi_reg" can be used to perform simultaneous EPI distortion-correction and registration of EPI to structural images. The list of optional parameters includes fmapmag and fmapmagbrain, as noted here.
http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/FLIRT/UserGuide#epi_reg
However, I am puzzled by the log after running the following FSL tutorial (http://fsl.fmrib.ox.ac.uk/fslcourse/lectures/practicals/reg/index.html). When using Feat GUI, with B0-unwarping option selected, it seems that identical values were passed to fmapmag and fmapmagbrainl!?
May I know what is the difference between fmapmag and fmapmagbrain? Along similar lines what was the rationale behind having separate parameters?
Regards,
Louis.
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