Figure 2From: Test-retest variability of adenosine A2A binding in the human brain with 11C-TMSX and PETTissue-to-plasma ratio curve averaged across subjects ( n  = 4) in six ROIs. ROIs are (A) putamen (diamonds), cerebellum (triangles), and cortex (circles) and (B) caudate head (diamonds), thalamus (triangles), and centrum semiovale (squares). Open symbols and closed symbols show test and retest scans, respectively. Error bars show the standard deviation.Back to article page