Figure 2.

Reward-related [¹¹C]raclopride displacement. A, Coronal section of the striatal ROIs in the left hemisphere. The corresponding ROIs in the right hemisphere were also segmented. B, Time–activity curves of a representative single subject. Total binding in the NAcc, unspecific binding in the cerebellum, and specific binding in the NAcc as the difference NAcc-cerebellum are shown. The x-axis depicts the time of PET scanning, starting with the injection of [11C]raclopride. The y-axis displays local radioactivity in the NAcc and cerebellum and the difference of NAcc and cerebellum activity, in MBq/mm³.