[Freesurfer] longitudinal norm.mgz only

Hi ,

I am new to longitudinal processing using freesurfer. I am about to process a big dataset of longitudinal images.

If in the end, I am only interested in norm.mgz file, is there a way I can speed up the processing time of the entire pipeline?

Since norm.mgz gets created in cross sectional processing after canorm steps of autorecon2, would these sequence of commands work for a subject?

1) recon-all -autorecon1 -subjid <tpNid> 2) recon-all -autorecon2 -subjid <tpNid> -gcareg -canorm 3) recon-all -base <templateid> -tp <tp1id> -tp <tp2id> ... -all 4) recon-all -long <tpNid> <templateid> -all

Thanks in advance, Nikhil