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

History of AFNI updates  

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June 15, 2015 07:04PM
Thanks, for the response! I see what you mean about individual subject variation. The reason for using a gray matter mask at the single subject stage is out of a necessity for the average time signal I extract per ROI per person to come specifically from gray matter. The end result of this analysis is outcome measures from the Brain Connectivity Toolbox, which involves inputting connectivity matrices built of each participants' time signal per ROI(so an ROIxROI matrix for every individual)..So there isn't a final group level image per-say at which I could apply a gray matter mask. Currently I plan to multiply a gray matter mask by my ROI Mask. I wonder if it wouldn't make the most sense to use an average of all my subjects' gray matter masks? Although averaging the masks could introduce it's own issues for accuracy of gray matter segmentation I suppose. I appreciate any feedback, thank you!

Best,
Sam DeWitt
Subject Author Posted

gray matter mask

jinny March 03, 2009 03:30PM

Re: gray matter mask

ziad March 03, 2009 03:43PM

Re: gray matter mask

jinny March 03, 2009 03:53PM

Re: gray matter mask

tom March 03, 2009 04:14PM

Re: gray matter mask

Daniel Glen March 03, 2009 05:09PM

Re: gray matter mask

alibc90 May 27, 2015 03:09PM

Re: gray matter mask

dewitt.77 June 04, 2015 02:53PM

Re: gray matter mask

rick reynolds June 08, 2015 09:15PM

Re: gray matter mask

dewitt.77 June 15, 2015 07:04PM

Re: gray matter mask

rick reynolds June 17, 2015 11:07AM