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May 23, 2023 01:45PM
Hi and thank you.

Example 11b applies for my case, because I do not use freesurfer data, but a ROI that I created in AFNI (a NIFTI file). This ROI file is based on the anatomical MNI152 template (but only using the cerebral cortex, not the whole brain) and hence the same for every subject.

Based on my understanding, the code should then look as follows, correct?

-mask_import cc cerebral_cortex.nii \
-regress_ROI cc \

In this case, AFNI proc would take the "cerebral_cortex.nii" ROI file and apply GSR based only on the voxels within that ROI (instead of using all brain voxels to compute the global signal), is that correct?



Edited 1 time(s). Last edit at 05/23/2023 01:45PM by Philipp.
Subject Author Posted

GSR in AFNI proc - how to apply GSR based on a ROI?

Philipp May 23, 2023 11:56AM

Re: GSR in AFNI proc - how to apply GSR based on a ROI?

rick reynolds May 23, 2023 01:24PM

Re: GSR in AFNI proc - how to apply GSR based on a ROI?

Philipp May 23, 2023 01:45PM

Re: GSR in AFNI proc - how to apply GSR based on a ROI?

rick reynolds May 23, 2023 03:39PM

Re: GSR in AFNI proc - how to apply GSR based on a ROI?

Philipp May 24, 2023 12:28AM

Re: GSR in AFNI proc - how to apply GSR based on a ROI?

Philipp May 24, 2023 08:23AM

Re: GSR in AFNI proc - how to apply GSR based on a ROI?

ptaylor May 24, 2023 08:34AM

Re: GSR in AFNI proc - how to apply GSR based on a ROI?

rick reynolds May 24, 2023 09:05AM

Re: GSR in AFNI proc - how to apply GSR based on a ROI?

Philipp May 25, 2023 02:49PM