Dear FS-experts,

I want to create myelin maps out of T1w/T2w contrasts and I have already read this e-mail conversation from the archive: MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg70222.html. It is suggested to use the PVC function of PETsurfer on the T1/T2 ratio. However, I have trouble understanding which commands are necessary for this task.

How is the T1/T2 ratio obtained? Did I understand correctly that then running gtmseg and mri_gtmpvc described in MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://surfer.nmr.mgh.harvard.edu/fswiki/PetSurfer are sufficient or are additional functions necessary? For mri_gtmpvc, what flags are required (since usually --i defines a PET image which we of course don't have)?

Best,

Melissa Thalhammer