as you note, the gtmseg.mgz has higher resolution and several new ROIs.
the higher res is for partial volume correction. The inclusion of pons
to for the possibility of using it as a reference region, which often
happens in AD studies of FDG. Vermis is for use in serotonin studies so
it can be
External Email - Use Caution
Hello Freesurfer Developers,
I have some questions about why the first step of PETSurfer needs to create
gtmseg.mgz segmentation.
I noticed that the differences between gtmseg.mgz and aseg.mgz are the
gtmseg.mgz has a higher resolution and also to
