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Representative brain uptake with compartmental fitting from 40-y-old healthy man injected with 755 MBq of 11C-NOP-1A. Concentration of radioactivity from 3 regions is shown: putamen (○), with highest uptake; cingulate cortex (•), with medium uptake; and cerebellum (□), with lowest uptake. Line represents unconstrained 2-tissue-compartment fitting.
