Hi Doug,
The white matter in aseg seems to follow the same pattern as the white
matter in wmparc...it goes into the ribbon (through the white matter
surface into gray matter).
-Ryan
On Dec 7 2007, Doug Greve wrote:
Can you load and examine the aseg.mgz, {lh.rh}.ribbon.mgz? How do they
look in that area?
Ryan Muetzel wrote:
Hi Doug,
The images are attached. Thanks again for your help!
-Ryan
On Dec 6 2007, Doug Greve wrote:
Can you send a pic?
Ryan Muetzel wrote:
Hello,
We are running Freesurfer version 4.0.1 and seem to be having
problems with the white matter/gray matter parcellation borders.
When viewing the pial and the main white surfaces in tkmedit,
everything looks good against the t1 brain. However, when the wmparc
is loaded on, we are seeing that the wmparc ROIs sometimes do not
follow the white surface----the ROIs are going into the gray matter
regions.
Are the white matter surfaces converted to volumes and then
convolved with the aseg/aparcs/etc or are they only used for the
cortical thickness computations? It almost seems as if the intensity
based wm seg is used and not the wm surface based
(?h.dwhite.ribbon.mgz)?
Any help is much appreciated!
-Ryan
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