CBF images at the level of the basal ganglia in a 28-year-old woman. Data were acquired with a NEX of 2 and a postlabeling delay of 1525 ms at rest (A) and 3 minutes (B), 9 minutes (C), 15 minutes (D), and 31 minutes (E) after acetazolamide injection. The time indicates the mid time of data acquisition. The upper and lower limits of the color scale are set at 110 and 0 mL/min per 100 g, respectively. F, ROIs placed automatically by the 3D-SRT software.