[Positron emission tomography (PET) in the study of senile dementia].
D000368:Aged; D001921:Brain / Q000000981:diagnostic imaging* / Q000378:metabolism; D002560:Cerebrovascular Circulation; D003704:Dementia / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D010101:Oxygen Consumption; D014055:Tomography, Emission-Computed