Re: [Freesurfer] How is Total cortical gray matter volume calculated?
Yes, based on the surfaces. We use Anderson Winkler's truncated pyramid method. On 10/22/2020 5:55 AM, Ian Hardingham wrote: > External Email - Use Caution > > Hi Freesurfers, > > Is "total cortical gray matter volume" from aseg.stats calculated based > on the recon-all Surfaces? Or using a different method? > > I ask because I have been trying to calculate the grey matter volume > based on the area between the surfaces, and I have been getting > different results. > > Thanks, > > Ian > > > ___ > 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
Re: [Freesurfer] How is Total cortical gray matter volume calculated
The volume between the surfaces is calculated On 4/25/2020 2:56 AM, Ian Hardingham wrote: > External Email - Use Caution > > Morning Freesurfers. > > Can you describe how the FS stat Total cortical gray matter volume is > calculated from the files in the freesurfer subject directory? Is there > an mgz file where each voxel has an estimated percentage grey matter > here as the value... or is the volume between the surfaces calculated > somehow? > > Thanks, > Ian > > > ___ > 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
Re: [Freesurfer] How is Total cortical gray matter volume calculated
External Email - Use Caution Ian, You can use the mris_anatomical_stats command with the -b option. E.g., mris_anatomical_stats -b subjectid lh will give you a tabular output containing the total gray matter volume in the 3rd column: 128449 86239 *243375 *2.588 0.876 0.123 0.026 1496 133.3 /xxx./subjects/QEN001/surf/lh.white See https://surfer.nmr.mgh.harvard.edu/fswiki/mris_anatomical_stats for more information. Xiaojiang ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
[Freesurfer] How is Total cortical gray matter volume calculated
External Email - Use Caution Morning Freesurfers. Can you describe how the FS stat Total cortical gray matter volume is calculated from the files in the freesurfer subject directory? Is there an mgz file where each voxel has an estimated percentage grey matter here as the value... or is the volume between the surfaces calculated somehow? Thanks, Ian ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
