afni.nimh.nih.gov

Hi Emily,

If the mask is in orig space, that suggests it was
drawn on an individual subject. Is that the case?
If so, you just start with a normal anatomical
alignment of that subject to an MNI template.

If instead it is really from that probabilistic atlas,
it is likely already in some standard space, and
you should be sure of what space that is before
proceeding.

- rick