Re: [Freesurfer] psf formula PET SURFER

2024-02-23 Thread Douglas N. Greve
I'm not sure what you are looking for as it is just the equation of a gaussian. The PSF is given as the full-width-half-max. This is converted to a std dev with gstd = fwhm/sqrt(log(256.0)) On 2/18/2024 7:03 AM, Federica Di Antonio wrote: External Email - Use Caution Dear experts,

[Freesurfer] psf formula PET SURFER

2024-02-18 Thread Federica Di Antonio
External Email - Use Caution Dear experts, I'm employing PETsurfer for partial volume correction. Could you share the definition or formula you use to define the psf (flag --psf of mri_gtmpvc) that is used to correct the PET image? I understand that it is an isotropic gaussian