Hi Freesurfers,
I have a question about the direction of the transformation written out to
the register.dat file by bbregister.
I have looked at the fscoordinates powerpoint presentation, which I think
is telling me that this matrix actually maps from the orig.mgz RAS
coordinates to the functional RAS coordinates. That agrees with the results
I get when I try to use the matrix outside of Freesurfer. However, this is
a little surprising, because I think of the bbregister process as aligning
the functional (moving) with the anatomy (target) so I would have expected
the transform matrix to represent that mapping.
Can you please confirm whether my understanding of the fscoordinates
presentation is correct, or help me out if I am off base?
Thanks!
Michael