If you go into the qdec output directory, you will find a contrast for
each group (class). In the contrast directory, you will find a file
called gamma.mgh. This will be the average thickness for the group. You
can load it into tksurfer, something like:
tksurfer fsaverage lh inflated -overlay gamma.mgh
doug
Bramen, Jennifer E. wrote:
Dear Freesurfer List
I want to look at the average thickness maps for each of my groups, not just the
statistical maps displayed by qdec. I think I found a tool that can do this. I used
mri_preproc and a list of subjects instead of a single subject, and now have the
output. I do not know to view this output though (<group
descriptor>_thickness_fsavg.mgh). Can someone explain what this output is and how
I can use it?
The other alternative is make_average_surface for each of my groups. Is that
what I need to be doing? It takes a ong time to run, so I was hoping there was
another way to go.
Thank you
Best regards,
Jennifer Bramen, Ph.D.
Postdoc
David Geffen School of Medicine at UCLA
Developmental Cognitive Neuroimaging 635 Charles Young Drive South
Los Angeles, CA 90095-7332
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