Hi,
I've been co-registering the EPI data to my anatomical data and have noticed some really poor co-registration after which I often have to use -big_move to rerun the co-registration. This is bizarre because these subjects are not moving a lot at all < 1mm or degree in any direction.
Does anyone know why this may be? Why is co-registration poor if there is not a lot of movement?
Is there anything wrong with starting to use -big_move to begin with or should I only use that command if the alignment looks really bad?
Thanks!
Anita
