Try
cd yoursubjectname/mri
mris_volmask  --label_left_white 2 --label_left_ribbon 3 --label_right_white 41 --label_right_ribbon 42 --save_ribbon yoursubjectname

On 5/3/2021 4:31 PM, Caspar M. Schwiedrzik wrote:

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Hi!

I am trying to make a ribbon.mgz from a non-human primate surface recon that does not have an aseg. Following this prior discussion: MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be Re: [Freesurfer] ribbon.mgz Without aseg.mgz (mail-archive.com) I tried mri_ribbon:

mri_ribbon ./surf/rh.white ./surf/rh.pial ./mri/orig.mgz 
rh.ribbon.mgz

Attached is the output. It looks like it roughly follows the grey matter, but especially the sulci seem to be filled. Unfortunately, there is no help for mri_ribbon. Any advice on how to proceed? The above mentioned discussion did not lead to a conclusion on how to get a ribbon without aseg.

Thank you! Caspar

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