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Axial [123I]-β-CIT SPECT images at the level of the striatum (left) and cerebellum (right) with ROIs in the thalamus (left) and the cerebellar hemispheres (right). Image acquisition 4 h post-injection. The level of radioactivity is color coded from black (low) through green, yellow, red, and white (high) and scaled to the maximum of the study. [Neuropsychopharmacology, 2007, 32, 1661–1668]