On 8/21/15 3:47 PM, Matthieu Vanhoutte wrote:
xhemireg seems to create e.g. left symmetric surface of the right
normal one. Once xhemi/surf/lh.pial has been created and surface data
surf/rh.overlay.mgh copied into xhemi/surf/lh.overlay.mgh,
Yes, both the lh and the rh are registered to the lh symmetric surface.
Though it has an lh designation, the hemi is meaningless because it
symmetric. Why does this not work for your data?
why don't register surf/lh.overlay.mgh and xhemi/surf/lh.overlay onto
fsaverage lh.pial surface ?
because fsaverage is not symmetric.
Best regards,
Matthieu
Le 21 août 2015 19:49, Douglas Greve gr...@nmr.mgh.harvard.edu
mailto:gr...@nmr.mgh.harvard.edu a écrit :
Sorry, what is the problem? Is sounds like xhemi should be
apprpriate for your application. fsaverage is not symmetric and
will lead to biased results.
On 8/20/15 9:27 AM, Matthieu Vanhoutte wrote:
Dear FS experts,
I have shown in mailing list and xhemi commands as explained
here, a beginning of a solution to my problem :
http://surfer.nmr.mgh.harvard.edu/fswiki/Xhemi
However, I didn't understand all the steps needed in may case. I
have patients with unilateralized problem on left or right
hemisphere. But, I would like to statistically compare left vs
right hemisphere groups. So, I think xhemi should help me to
register for example both hemispheres of my right lateralized
patients onto symmetrical template ?
I have already registered my surface data of all patients on
fsaverage template. Couldn't it be possible to apply Xhemi
transformation on fsaverage surface data of all right lateralized
patients ? What are the steps to do it ?
Many thanks in advance for helping !
Best regards,
Matthieu
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