The main objective of this study is to evaluate the differences in [18F]FEOBV binding between PD patients and healthy control subjects, in order to evaluate the clinical feasibility of [18F]FEOBV as a cholinergic imaging ligand in PD. Secondary objectives are the assessment of test-retest variability and confirming previous findings on [18F]FEOBV validation. Both secondary objectives are prerequisites for the main objective. In addition, an explorative analysis of the relationship between neuropsychological performance and cholinergic innervation will be performed.