Fig. 2

Scatterplots of ScanOnlyDB ¹²³I FP-CIT SBR (Chang AC) values as a function of age for both male (open circle) and female (blue circle) for the three VOIs: Striatum (a), Caudate (b), and Putamen (c). Data relevant to each gender were independently fitted by linear regression lines (solid black line for males and solid blue line for females) and superimposed on each respective scatterplot. Age-gender interaction of striatal SBR for a mean age of 31 years (orange), 62.5 years (yellow), and 94 years (purple) is shown in (d)