Abstract
Three decades with the amyloid hypothesis, nearly two with amyloid-PET imaging, and one with testing of anti-amyloid therapy have not yielded benefits to patients with Alzheimer's disease (AD). It is time to focus on more promising options, e.g., infection, low dose radiation, and atherosclerosis. The relevance of the latter in managing AD has fluctuated from being significant to insignificant. Current methodologies for detecting cerebral atherosclerosis reflect advanced changes in only major arteries. In contrast, 18F-sodium fluoride PET imaging assessing early-stage cerebral atherosclerosis regionally or in the entire vascular bed may provide new insight in this age-related process in dementia.
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