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Mean DAT uptake ratios in PD, MSA, and PSP patients and healthy controls in (a) caudate, (b) putamen, (c) striate. Left and right uptake ratios are averaged. Whiskers represent 95% confidence interval of mean. SPECT: single photon emission computed tomography; DAT: dopamine transporter imaging with 123 I-FP-Cit; MSA: multiple system atrophy, PSP: progressive supranuclear palsy; PD: Parkinson's disease; Healthy: healthy controls.
