title: The necessity for correcting for cerebral atrophy in global positron emission tomography measurements.
mesh_terms: D000368:Aged; D001284:Atrophy; D001921:Brain / Q000473:pathology*; D002552:Cerebral Ventricles / Q000473:pathology; D002560:Cerebrovascular Circulation; D003704:Dementia / Q000473:pathology; D006801:Humans; D014055:Tomography, Emission-Computed