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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rick reynolds
August 02, 2019 09:20AM
Hi rujing,

That would compute a TSNR result, but it might not be so desirable. That would not account for slow drifts, motion parameters in the data, etc. The drifts would make the biggest difference.

The way it is computed in afni_proc.py is to take the mean of the signal before the final linear re
gression divided by the stdev of the noise (the residual from the regression, after task, drifts, motion, etc. are removed).

Consider how it is done in AFNI_data6/FT_analysis/s12.proc.FT.align, for example. Search for TSNR.

- rick
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Subject Author Posted

What is TSNR?

heretic133 March 03, 2017 02:23AM

Re: What is TSNR?

rick reynolds March 11, 2017 09:41AM

Re: What is TSNR?

charujing123 July 31, 2019 03:20AM

Re: What is TSNR?

rick reynolds August 02, 2019 09:20AM