Longitudinal Decline of Striatal Subregional [18F]FP-CIT Uptake in Parkinson’s Disease

Flow diagram showing the inclusion and exclusion criteria of the Parkinson’s disease (PD) and non-PD groups with each number of subjects. The subgroups of PD patients were divided by the age at onset and disease duration. ET, essential tremor; DIP, drug-induced parkinsonism; AP, atypical parkinsonism; VP, vascular parkinsonism; SDH, subdural hematom