On the basis of previous studies I have created 4 regions of interest using
the MNI brain151_T1_2mm. I want to TMS these areas and so am attempting to
transform these positions so that they are relative to each individual
subject's high-res structural scan (with skull). For these subjects I only
have a high-res structural.
I have attempted several things:
1) Use FLIRT to register the MNI brain to the structural brain (with skull).
Apply this transform to the ROI (with FLIRT transform)
2) Use FLIRT to register the MNI brain to the structural brain (without
skull). Apply this transform to the ROI, using the subject's structural with
skull as the reference volume.
3) Use FLIRT to register the structural (without skull) to the MNI. Invert
this transform, and apply this to the ROI, using the structural with skull
as the reference volume.
4) Use FLIRT to register the structural (with skull) to the MNI. Invert this
transform, and apply this to the ROI, using the structural with skull as the
reference volume.
None of these seem to make any difference to the position of my ROIs, and
get me nowhere near the anatomical positions I'm looking for (within the
parietal cortex).
Any help would be much appreciated.
Joe
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