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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:
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
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
| January 02, 2018 12:49AM | |
Hi, Sorry for bringing up this very old thread, but I have a related problem, for which I couldn't find a solution with AFNI:
If you have a scan with very strong and prolonged BOLD response (e.g. pharmacological fMRI), you wouldn't want your detrending polynomial to be based on all datapoints.
E.g:
The blue line is the correct detrending line, (here with matlab, which allows excluding the timepoints with the large response from the calculation).
The red line is considering all datapoints, which is what AFNI does by default, and which in this case would be wrong.
How can I create this kind of behavior to get the blue line with 3dcalc or some other tool?
Edited 3 time(s). Last edit at 01/02/2018 12:51AM by paranoidandroid.
If you have a scan with very strong and prolonged BOLD response (e.g. pharmacological fMRI), you wouldn't want your detrending polynomial to be based on all datapoints.
E.g:
The blue line is the correct detrending line, (here with matlab, which allows excluding the timepoints with the large response from the calculation).
The red line is considering all datapoints, which is what AFNI does by default, and which in this case would be wrong.
How can I create this kind of behavior to get the blue line with 3dcalc or some other tool?
Edited 3 time(s). Last edit at 01/02/2018 12:51AM by paranoidandroid.
