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Experts say positron emission tomography (PET) brain scans, which can detect the beta-amyloid plaques linked to Alzheimer’s, could be on the market within the next year.

At the Society of Nuclear Medicine 58th Annual Meeting in San Antonio this spring, researchers said that a positive scan for amyloid is the most accurate predictor for cognitive decline.

According to experts, PET scans also could be helpful in developing vaccines and therapies for Alzheimer’s. Researchers said that early stages of the disease can precede the arrival of early symptoms by 10 or more years.