title: High-resolution PET studies in Alzheimer's disease.
abstract: Forty-seven patients with probable dementia of the Alzheimer type (DAT) and 30 healthy age-matched controls were scanned using [18F]-2-fluoro-2-deoxy-D-glucose on a Scanditronix PC 1024-7B tomograph (inplane resolution = 6 mm, axial resolution = 10 mm). Patients and controls were scanned in the resting state with their eyes patched and ears occluded. The regional cerebral metabolic rates for glucose (rCMRglc) in most major neocortical and subcortical gray matter regions, and certain metabolic ratios (rCMRglc/ calcarine rCMRglc), quantitatively discriminated even the mildly demented patients from healthy controls. The association neocortices showed metabolic abnormalities that were more severe than those in the sensorimotor and calcarine regions. All demented groups showed significant neuropsychological disturbances when compared to healthy controls. These data demonstrated widespread metabolic disturbances, particularly in the association areas, relatively early in Alzheimer's disease, and more profound involvement with disease progression.
authors.affiliation: Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Bethesda, Maryland 20892.
authors.forename: A
authors.initials: A
authors.lastname: Kumar
authors.forename: M B
authors.initials: MB
authors.lastname: Schapiro
authors.forename: C
authors.initials: C
authors.lastname: Grady
authors.forename: J V
authors.initials: JV
authors.lastname: Haxby
authors.forename: E
authors.initials: E
authors.lastname: Wagner
authors.forename: J A
authors.initials: JA
authors.lastname: Salerno
authors.forename: R P
authors.initials: RP
authors.lastname: Friedland
authors.forename: S I
authors.initials: SI
authors.lastname: Rapoport
mesh_terms: D000544:Alzheimer Disease / Q000000981:diagnostic imaging / Q000378:metabolism* / Q000523:psychology; D001921:Brain / Q000000981:diagnostic imaging / Q000378:metabolism*; D003847:Deoxyglucose / Q000031:analogs & derivatives* / Q000378:metabolism; D005260:Female; D005462:Fluorine Radioisotopes; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D009928:Organ Specificity; D012016:Reference Values; D014055:Tomography, Emission-Computed
chemical_list: D005462:Fluorine Radioisotopes; D019788:Fluorodeoxyglucose F18; D003847:Deoxyglucose