AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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EXP.2086
July 20, 2021 09:57PM
Hi,

Is there a surface-way, maybe by using the thickness map, to calculate the gray matter volume of a functionally defined surface ROI (in std.141 surf)? Or by using 3dSurf2Vol to map back to volume to calculate the gray matter volume? Is this as accurate as calculating on surface directly?

And does it make sense to compare the gray matter volume between two group, say young and old, under the same std.141.surf functionally defined ROI? The (same std.surf ROI) = (same std.surf nodes number) ≠ (same std.surf area)? So it does not make sense?

Thanks,
2086



Edited 1 time(s). Last edit at 07/20/2021 10:55PM by EXP.2086.
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Subject Author Posted

How to calculate the gray matter volume of a surface ROI?

EXP.2086 July 20, 2021 09:57PM

Re: How to calculate the gray matter volume of a surface ROI?

ptaylor July 26, 2021 05:37PM