Online placement of the 1
H-MRS volume of interest. Note. The volume is parallel to the AC-PC line. Its posterior border is aligned 3 mm posterior to the point of posterior commissure using the sagittal view. Its inferior border is placed axially on the first slice where the corpus callosum meets from the two hemispheres. In the right/left direction, it is centered on the white matter fibre tract using the inferior axial slice.