[Freesurfer] Interior white matter surfaces

2013-06-19 Thread Jason Reed 
Dear FreeSurfer Experts,

I am attempting to construct surfaces that are 1, 2, 3, and 4 mm 
interior from the GM/WM boundary (?h.white). So going gradually deeper 
into white matter from the GM/WM boundary.  I have successfully used 
mris_fill to fill the ?h.white surface and mri_morphology to erode the 
resulting volume, but I'm not sure on the correct procedure to create 
the new surfaces.  Any advice or suggestions on tools with options to 
use will be greatly appreciated!

My eventual goal is to project coregistered DTI data onto these more 
interior white matter surfaces.

Thanks!
-Jason

-- 
Jason Reed
VA San Diego Healthcare System (116A-13)
3350 La Jolla Village Drive
San Diego, CA 92161
Phone: (858) 552-8585 ext. 2946
Fax: (858) 642-3836
jr...@vapop.ucsd.edu


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[Freesurfer] Normalization of wmparc.stats?

2010-08-06 Thread Jason Reed 
Hi all,

Regarding the white matter parcellations in the wmparc.stats file, is it
necessary to normalize these values by eTIV or by another factor? Or
should this step be skipped as with the cortical thickness measures
(?h.aparc, etc.)?

Thanks!

-Jason 
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