Dear SPM expert:
I want to transformation matrix mapping from voxel coordinates to real
world coordinates.
In the spm_vol function, the V.mat is the transformation matrix. However,
this matrix is only valid for image after normalization using SPM. In other
case, it seems to return an arbitrary
matrix.
Before normalization, how should I transform from voxel coordinates to
real world coordinates?
Thanks a lot,
Liu
Yang