yes, Diana Rosas' HD paper and Gina Kuperberg schizophrenia paper both have validation studies in them. As does our PNAS thickness paper
On Wed, 12 Jul 2006, Derin Cobia wrote:
Bruce,
Sorry, I think I was confusing. Basically I was wondering how the numbers in mris_anatomical_stats are calculated, and if I can independently verify them. Does a paper/article address this? Thanks again for your help.
-Derin
Hi Derin,
no, they aren't quantized - they are computed from the surfaces, which live in a continuum.
Bruce
On Wed, 12 Jul 2006 derin@conte.wustl.edu wrote:
Are not the mris_anatomical_stats voxel-based as well? I thought that was what I was measuring in *total gray matter volume*. If the aseg & ribbon files are quantized to 1mm^3, what is the surface? Plus, is there any way to verify the stats I'm getting in mris_anatomical_stats? Thanks.
-Derin
the aseg will be different, since it's voxel-based (and typically not as accurate as the surfaces) On Mon, 10 Jul 2006 derin@conte.wustl.edu wrote:
Is this true of the aseg files as well? I tried *double-checking* the mris_anatomical_stats by using the aseg file in MatLab (assigning values to the voxel-intensities, counting them up, etc, etc) and the numbers came up different. Is that why? Probably not the best method now that I think about it... Thanks Doug & Bruce.
-Derin
It is only cortical. And you don't want to use ?h.ribbon.mgz as this is quantized to 1mm^3 and will be less accurate than mris_anatomical stats.
doug
derin@conte.wustl.edu wrote:
> Hi, > > I am attempting to assess (& compare) total cortical gray matter > volume > in > a series of subjects (schiz vs. control), and was wondering if the > tabular > mris_anatomical_stats gm output consisted of only cortical gm, or > included > subcortical and other nuclei as well. I've searched the wiki, > articles, > and listserve archive with not much success; I get the sense that it > is, > but want to make sure. Additionally, what is shown in the > ?h.ribbon.mgz > files appears to be exactly what I am looking for. Is there any way > to > run the mris_anatomical_stats command on these files (use > mris_convert > maybe)? Thanks in advance. > > -Derin > > > > _______________________________________________ > 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
In order to help us help you, please follow the steps in: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer