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.
To continue with Jim's message: you can also create a mask dataset using the "Draw Dataset" plugin. This will let you manually select the ROI (slice-by-slice) by drawing with the mouse. Then 3dmaskave can dump the desired ROI-averaged data out for you.