Fig. 3

Short versus longer acquisition protocol. Box-and-whisker plots of putamen/caudate nucleus ratio (top) and SBR for putamen (bottom; lowest SBR of right/left hemisphere) for 92 patients illustrating the difference between normal and abnormal patients. Six patients were excluded due to injected dose below 100 MBq. Left column: 30–40-min reconstruction, right column: 17–42 min. No significant difference in the ability to separate abnormal and normal scans was found