I have an ROI defined in MNI152 space, and I would like to measure its
volume in native space using the jacobian volume produced by FNIRT
with the --jout option. But does the jacobian include the eventual
scaling present in the affine matrix or I have to add it (multiply it
If for example, the affine matrix changes the orientation but also the
size of the input brain, do I have to add this scaling to the values
of the jacobian at each voxel?
thanks in advance!