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Dear Freesurfer experts, I have ten PET frames for every subject in my database. these frames represent specific time during PET acquisition. Due to head motion during acquisition the frames are not fully overlapped on top of each other. I created template represent the mean of the ten frames. I would like to register each low res frame to this low res template. Which tool in Freesurfer is more robust to achieve this goal. Any additional suggestions are highly appreciated Thanks John