We use partial volume correct. Maybe that is the problem. What version of FS are you using?
On 11/18/2020 10:37 AM, Vicente Ferrer wrote:
External Email - Use CautionHello Freesurfer,
Once I had run reconall, I tried to calculating left hemisphere total grey matter volume and right hemisphere total grey matter volume by doing the sum of: TGM_left=lhcortexvol + Left-Cerebellum-Cortex + (Left-Thalamus-Proper + Left-Caudate + Left-Putamen + Left-Pallidum + Left-Hippocampus +Left-Amygdala +Left-Accumbens-area +Left-VentralDC) using the volumes values of the aseg.stats file. I did it like this because of the definitions of TGM in this webpage: https://secure-web.cisco.com/18pk-Ax0hgeQLjPCil_KNGcr0ZuCL3RBLq8NqkvLiWHU5VU... However I did a saninty check and compared the TGM_estimated=TGM_left + TGM_right. with the measurement in the aseg file: Measure TotalGray, TotalGrayVol, Total gray matter volume. They are similar but not the same. Which makes me wonder if this is not the proper ay of calculating it. Therefore: which is the best way of calculating left hemisphere total grey matter volume and right hemisphere total grey matter volume in a separated manner?
Thanks in advance, Vicente Ferrer Predoctoral Researcher BCBL http://secure-web.cisco.com/1Y80FAmAIDLnW-nPDCMBRDUQbmyy9_KQJaimWnm60B6mbmpK...
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