In vivo brain uptake [11C]CS1P1 in the non-human primate brain. (A) Average of standard uptake of total [11C]CS1P1 in six NHP brains; (B) average uptake of [11C]CS1P1 in different regions including prefrontal, basal frontal, caudate, putamen, hypothalamus, and midbrain in six NHP brains; (C) average uptake of [11C]CS1P1 in different regions including lateral and medial temporal, hippocampus, thalamus, cerebellum, and cortical white matter in six NHP brains; and (D) representative different frames of PET images and MRI images of [11C]CS1P1 in the selected NHP brain.