DaTSCAN (FP-CIT) in a healthy control (A) and patients with Parkinson’s disease (B), Alzheimer’s disease (C), and dementia with Lewy bodies (D). Used with permission from Walker Z, Costa DC, Walker RW H, et al. Differentiation of dementia with Lewy bodies from Alzheimer’s disease using a dopaminergic presynaptic ligand. J Neurol Neurosurg Psychiatry 2002;73(2):134–140.