Sorry for posting it again, but I'm in a hurry. Which version of the brain extracted fieldmap magnitude image should be used as "Fieldmap mag" in FEAT/Pre-stats/B0 unwarping? The eroded version (FMAP_MAG_brain_ero), which was also used when processing the "fieldmap phase" using fsl_prepare_fieldmap, or the non-eroded one (FMAP_MAG_brain)?
I'd really appreciate any help regarding the above issue.
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