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Average time course of radioactivity in brain after injection of 18F-SP203. Concentrations of radioactivity are shown for brain regions with highest (temporal cortex, ●) and lowest (thalamus, ○) concentrations of radioactivity and skull (□). Measured brain data were fit with 2-tissue-compartment model without constraint (solid line). Data represent mean ± SD of all 7 subjects. Conc = concentration.
