Yes, it is possible. As long as the registration looks good in tkmedit/tkregister2, then it should accurately map to the surface, even a to a different target surface. What are you using to view the surface? One thing you should check though is whether it mapping as expected to the subject's own surface. You can do this with
tksurfer subjname lh inflated -overlay zstat1.nii.gz -overlay-reg register.dat
doug
emoulton@mclean.harvard.edu wrote:
Can a partial brain statistical image volume be accurately registered to a whole brain surface-based map? When I try to convert a partial brain statistical file (zstat1.nii.gz, created using FSL) into an overlay for a surface-based full brain (created using FreeSurfer), the result is a statistical overlay that spreads across the entire surface of the brain. My command line looks like this:
mris_preproc --out lh-zstat1.mgz –target SUBJ1 --hemi lh --mean --iv zstat1.nii.gz ../../../anat/Dummy.feat/reg/freesurfer/anat2exf.register.dat
My register.dat transformation matrices work fine when I use tkmedit to view the cope1.nii.gz image as an overlay of the orig.mgz file (partial brain zstats where I would expect them on the image of the full brain). Does mris_preproc adher strictly to the register.dat parameters, or is it possibly over-ridden by the –target surface?
Thanks, Eric
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