In vivo microPET rat brain test-retest study. (A) Horizontal, (B) sagittal, (C) coronal of 18F-nifene. The thalamus (TH) shows the highest binding followed by the cortex (COR) and the cerebellum (CB). Test-retest study showing consistency in binding of 18F-nifene to the thalamus with respect to the cerebellum. BPND for the test study was 1.69 while the retest study was 1.64.