title: Positron emission tomography in normal aging and Alzheimer's disease.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D000544:Alzheimer Disease / Q000188:drug therapy / Q000503:physiopathology*; D002560:Cerebrovascular Circulation / Q000187:drug effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D014055:Tomography, Emission-Computed