After running the first step of PETsurfer (https://surfer.nmr.mgh.harvard.edu/fswiki/PetSurfer). I viewed the image it created using freeview. When I change, the color map to Lookup Table, the image also included the skull. How can I remove the skull from gtmseg.mgz/prevent it from showing? Any help will be appreciated. Thanks. Please, see attached image

Best, 

Paul