If you visualize the segmentation (aseg.mgz) in tkmedit you can see exactly what is labeled Cerebral-White-Matter and Cerebral-Cortex based on the volume (not the surface) segmentation.
As for the "Intracranial Volume" value in the preamble of the aseg.stats file, that is a statistical estimate of the ICV, based on the determinant of the atlas transformation. Some details can be found here: http://surfer.nmr.mgh.harvard.edu/fswiki/eTIV cheers, Mike H. On Thu, 2009-06-11 at 15:35 -0400, Sherri Novis wrote: > Hello - can anyone tell me where I can find details on what aseg stats > include and exclude from each measurement? The ones I need in particular > are: Left-Cerebral-White-Matter Left-Cerebral-Cortex and IntraCranialVol. > I'd like to understand if L-Cereb-Cortex means just gray matter, and/or if > it includes ventricles & subcortical structures. I'm also trying to find > out if IntraCanial Volume means the space of the skull cavity, or if it means > something different. > > Thanks much in advance - > Sherri > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
