External Email - Use Caution       

Hi all,

I've generated two surface overlays, using mri_vol2surf with positive and negative projfrac to get a GM and WM samples (gm_lh.nii.gz and wm_lh.nii.gz). I'd now like to take the vertex-wise ratio of these two overlays, and make a new one (gmwmratio_lh.nii.gz). I've tried doing this as:

fslmaths gm_lh.nii.gz -div wm_lh.nii.gz gmwmratio_lh.nii.gz

but the result is:

Image Exception: #22 :: Failed to read volume gm_lh.nii.gz
Error : Error: Nonsensical ROI for gm_lh.nii.gz

Is there another tool I can use to compute this ratio? Is there a better workflow than making two surfaces and dividing?


Thanks,
Dylan



_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer