Example of ROIs in the white matter (red), gray matter (blue), and CSF (green) that were used in reproducibility analysis (1 = caudate nucleus, 2 = putamen, 3 = globus pallidus, 4 = thalamus, 5 = splenium of corpus callosum, 6 = occipital white matter, 7 = cortical gray matter in occipital lobe, 8 = frontal white matter, 9 = CSF, 10 = occipital white matter, 11 = substantia nigra, 12 = red nucleus).