Test–retest reproducibility of dopamine transporter density measured with [18F]FP-CIT PET in patients with essential tremor and Parkinson’s disease

18F-labeled fluoropropyl-carbomethoxylodopropyl-nor-s-tropane ([18F]FP-CIT) positron emission tomography (PET) is a useful tool for evaluating disease progression in Parkinson’s disease (PD) patients. We evaluated the test–retest reproducibility of [18F]FP-CIT PET measures in essential tremor (ET) and PD patients. Fifteen ET (68.9 ± 6.6 years) and 10 PD patients (70.5 ± 6.3 years; Hoehn and Yahr stage, 2.3 ± 0.8) underwent two [18F]FP-CIT PET/CT...