Thank you a.y,
I am sorry if my question was not clear enough!
In Qdec/ tab "design" the user have the choice to choose the analyses that he
wants to conduct on aseg,mgz, wmparc.mgz or aparc+aseg.mgz.
These atlases report white and gray matter volumes.
in Qdec, if I choose volume from the dropdown menu "measure" under the tab
"design" to conduct surface based analyses. Dose this means surface based
analyses for gray matter volume or white matter volume?
In aseg you can find both volumes for whit matter and gray matter. so which
volume is Qdec referring to? If Qdec compute surface based analysis of gray
matter volume, then how can I do surface based analysis using the whiate matter
volume of the parcellates instead of the gray matter voluem of the parcellaets?
Is this feasible
J.
-------- Original Message --------
Subject: RE: [Freesurfer] White matter atrophy
Local Time: April 20, 2017 10:04 AM
UTC Time: April 20, 2017 2:04 PM
From: ayend...@mgh.harvard.edu
To: John Anderson <john.ande...@protonmail.com>, Freesurfer support list
<freesurfer@nmr.mgh.harvard.edu>
Hi John - Unless someone else has a better idea, the aseg (subcortical
segmentation) contains left and right cerebral and cerebellar white matter
labels. You can look at the ROI analysis tutorial for how to extract stats from
aseg labels.
Best,
a.y
---------------------------------------------------------------
From: freesurfer-boun...@nmr.mgh.harvard.edu
[freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of John Anderson
[john.ande...@protonmail.com]
Sent: Thursday, April 20, 2017 7:42 AM
To: freesurfer@nmr.mgh.harvard.edu
Subject: [Freesurfer] White matter atrophy
Dear Freesurfer experts,
I know how to do cortical thickness group analysis using Freesurfer, also I
know how to use Qdec to compare groups regarding gray matter volume
differences, cortical thickness, curvatures, area,... etc.
I am wondering if there is any way in Freesurfer to study the difference in
white matter volume between two groups?
I highly appreciate any suggestion!
John
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