The easiest thing would be to binarize the aparc+aseg like:
mri_binarize --i aparc+aseg.mgz --wm --o whitematter.mgz
You can the resample this to mni305 with:
mri_convert --apply_transform transforms/talairach.xfm whitematter.mgz
whitematter.mni305.mgz -oc 0 0 0
Not sure what you want to do now. You can then mri_concat the
whitematter.mni305.mgz files from you different subjects into one file,
or create a mean.
doug
muet0...@umn.edu wrote:
Hi FreeSurfers,
I was wondering if it is possible to obtain an average wmparc.mgz file
for a group of subjects that have been processed through freesurfer?
We have 72 cases that have been independently processed through
freesurfer, and we would like to generate a representative
white-matter "atlas" that could potentially be aligned to some
standard space (e.g., MNI). Would this be possible?
If this isn't possible, could we obtain this from fsaverage? I noticed
that $FREESURFER_HOME/subjects/fsaverage does have an aparc+aseg.mgz
--- is there also a way to get wmparc.mgz (e.g, using mri_aparc2aseg)?
Thanks in advance for any suggestions!
-Ryan Muetzel
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MGH-NMR Center
gr...@nmr.mgh.harvard.edu
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