[Freesurfer] psf formula PET SURFER

ssian filter, but could you maybe provide the precise formula you employ or the reference you refer to? Thank you so much for your kindness and availability, Federica Di Antonio ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu

[Freesurfer] PETsurfer: PVC without psf of the scanner

External Email - Use Caution 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.

[Freesurfer] cvs clarifications with petsurfer

External Email - Use Caution Dear Freesurfer experts, I'm using PETsurfer. I've done the standard pipeline for all my subjects, using the cvs registration. I was wondering (maybe it's very stupid) when the standard pipeline "uses" the cvs resulting files (except for subcortical vo

[Freesurfer] different results for gtmpvc with different tracers

External Email - Use Caution Dear experts, I hope this email finds you well. I run the pvc correction with mri_gtmpvc for subjects data obtained with two different PET tracers. In gtm.stats.dat, for every subject and every region, the number of voxels evaluated for amyloid tracer

Re: [Freesurfer] PETsurfer: PVC without psf of the scanner

f > Again, this has not been fully evaluated so use at your own risk. > > > On 12/12/2022 3:10 AM, Federica Di Antonio wrote: > > External Email - Use Caution > > Dear experts, > > > > Few weeks ago i wrote to this mailing list but I didn't rec

Re: [Freesurfer] different results for gtmpvc with different tracers

). Can I suppose this effect descends from the flag --automask? maybe the different automatic masks lead to different pixel size.. I don't know, I would be very grateful for any information. Thanks for all the help you can give me about; sincere greetings from Federica Di Antonio Il giorno lun

[Freesurfer] negative uptakes after GTM pvc correction

tration or segmentation can cause negative uptake values. At first sight it seemed intuitive to me, but on second thought that's not so obvious. I would be very grateful for any help! Federica Di Antonio ___ Freesurfer mailing list Freesurfer@nmr.mgh.ha

[Freesurfer] mri_cvs_register cost function

External Email - Use Caution Dear experts, May I ask you which cost function is used by mri_cvs_register? Thank you so much for your support! Federica Di Antonio ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https

[Freesurfer] negative uptakes after GTM pvc correction

tration or segmentation can cause negative uptake values. At first sight it seemed intuitive to me, but on second thought that's not so obvious. I would be very grateful for any help! Federica Di Antonio ___ Freesurfer mailing list Freesurfer@nmr.mgh.ha

Re: [Freesurfer] mri_cvs_register cost function

f the inputs, and the > volumetric registration step that, by default, uses SSE (sum of squared > errors) > > Best, Lilla > -- > *From:* freesurfer-boun...@nmr.mgh.harvard.edu < > freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of Federica D

Re: [Freesurfer] PETsurfer: PVC without psf of the scanner

f the definition of fwhm used by mri_gtmpvc was different from mine. Thenk you so much for your availability, Federica Di Antonio Il giorno lun 27 feb 2023 alle ore 14:30 Federica Di Antonio < fedediantoni...@gmail.com> ha scritto: > Thank you so much! > > > > Il giorno gio

Re: [Freesurfer] different results for gtmpvc with different tracers

nt voxel sizes? The gtm.stats.dat file > reports the number of voxels so if the volumes have different voxels sizes, > you will get different values out. If this is not the source of the > problem, please send the gtm.stats files. > > On 3/15/2023 4:06 AM, Federica Di Antonio wrot