SLC6A3 and Alzheimer disease: In the clinical diagnostics of neurodegenerative diseases, [123I]β-CIT-SPECT (single-photon emission computed tomography) can be used for imaging dopamine transporter availability for differential diagnostics of early or atypical PD, [11C]PIB for identifying amyloid pathology in early AD if routine morphological imaging is normal, and [18F]FDG (2-deoxy-2-[fluorine-18]fluoro-D-glucose) for detecting hypometabolism and differentiating dementia with Lewy bodies (DLB) or frontotemporal lobe degeneration (FTD) from AD.