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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sondosayyash
June 12, 2018 08:32PM
Hi everyone,

I was wondering if there was a way to determine the optimal number of ROI's one can achieve from performing 3dROIMaker?

There are many arguments that come with the 3dROIMaker command. And while they are useful, they can be overwhelming in the sense that I'm not sure how to get that golden number of ROI's that are optimal for each network?

Playing around with the different options for the arguments, made me realize I don't know how one would achieve the "optimal" number of ROIs.

What I have is this:

3dROIMaker -inset network0006.nii.gz -thresh 5.4 -prefix network6_thresh5.4 -volthr 130 -inflate 2 -trim_off_wm -wm_skel JHU-ICBM-FA-4mm.nii.gz -mask MELODIC.gica/mask.nii.gz -skel_thr 0.2 -nifti

But so far it's been a trial and error, paired with visual inspection. However, I'm not sure if thats reproducible for others who want to perform the same steps I did.

Would you happen to have any suggestions?
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Subject Author Posted

3dROIMaker optimal number of ROIs

sondosayyash June 12, 2018 08:32PM

Re: 3dROIMaker optimal number of ROIs

ptaylor June 12, 2018 09:55PM