5 Dec
2012
5 Dec
'12
6:58 p.m.
Hi Don, the average thickness is not weighted by vertex area. The volume computation is relatively simple: the volume of a vertex is computed as the thickness * the average area of the triangles that are adjacent to the vertex.
doug
On 12/05/2012 06:35 PM, Donald Hagler wrote:
Is there a detailed description somewhere of how the gray matter volume values are calculated for the aparc stats files?
Also, is the average thickness weighted by area?
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
--
Douglas N. Greve, Ph.D.
MGH-NMR Center
greve@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
Fax: 617-726-7422
Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html
Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/