Figure 5e.

Idiopathic Parkinson disease. (a) Axial FLAIR MR image shows hyperintense foci in the periventricular and subcortical white matter related to chronic small vessel ischemic disease. The white matter is otherwise normal. (b) FDG PET image shows parietal hypometabolism (arrows) and preserved basal ganglia activity. (c) Amyloid PET image demonstrates normal findings. (d, e) Semiquantitative 3D SSP FDG PET images (d) and Z-score images (e) show decreased temporal and parietal activity (arrows in e). (f) ¹²³I ioflupane SPECT image shows markedly decreased uptake in the putamina (arrows).