Hi Doug, Thanks!
I manually tweaked the registration of the PET to T1 on a number of subjects to bring the mincost down to < 0.5. After saving the pet2free volume in Freeview, I noticed that a new .lta is produced in the same directory (i.e. pet2free_fsl.mgz.lta). Will the option --regheader tell the subsequent commands (i.e. mri_vol2surf) to use the updated registration .lta instead of the original .dat that was produced via bbregister? Best Wishes, Elijah
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