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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October 19, 2012 12:12PM
The whereami program and all other afni programs can generate ROI datasets from the Talairach daemon on the fly. See the help for whereami and 3dcalc for some examples.

The Talairach daemon atlas is based on the Talairach-Tourneaux atlas of a post-mortem tissue analysis on half an individual's brain. There is no MRI template for that exact brain. Instead we use some other template that has been put into "Talairach space" using either a stereotaxic procedure (manual talairaching) or a specific transformation from another space. The TT_N27 dataset distributed with AFNI has been manually talairached. This procedure has some subjectivity, and the output brain will not be the same as the Talairach-Tourneaux atlas brain in any case. The structures will not match exactly, but should match approximately. If you're not seeing this, then there may be another issue in importing the data. Compare with whereami or 3dcalc's output of the same structures.

Consider using other atlases or templates. The ones distributed with afni are typically stored in the same directory as the binary. An easy way to view these datasets is to run afni on that directory:

afni ~/abin &

There was a similar discussion at this previous thread that might be useful:

http://afni.nimh.nih.gov/afni/community/board/read.php?1,80460,80480#msg-80480
Subject Author Posted

Talairach Atlas

Anonymous User October 18, 2012 10:51PM

Re: Talairach Atlas

Daniel Glen October 19, 2012 12:12PM

Re: Talairach Atlas

Anonymous User October 19, 2012 02:21PM

Re: Talairach Atlas

Daniel Glen October 19, 2012 03:04PM