I have something called the adaptive GTM that is currently a "hidden" feature in mri_gtmpvc as it has not been published yet. You can try it by adding the following flags --opt 1 --opt-tol 4 10e-6 .02 --opt-seg-merge
When this is done, there will be a file called gtmdir/aux/opt.params.dat The value in that file with be the fwhm. Run mri_gtmpvc again passing that value as the --psf
Again, this has not been fully evaluated so use at your own risk.

On 12/12/2022 3:10 AM, Federica Di Antonio wrote:

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Dear experts,

 

Few weeks ago i wrote to this mailing list but I didn't receive any answer, so I'll try again:

mri_gtmpvc --i pet.nii.gz --reg template.reg.lta --psf FWHM --seg gtmseg.mgz

 --default-seg-merge  --auto-mask 1 .01 --mgx .01 --o gtmpvc.output


If I put psf to 0, there is no PVC, and the same happens if I don’t put that flag at all.t all

Is able mri_gtmpvc to evaluate the fwhm without receiving it from the user? 

I apologize for the repetition, 

Thanks for your patience, 

Federica

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