Brain imaging predicts Alzheimer’s before symptoms

Positron emission tomography used in conjunction with a radioactive dye may help predict the onset of Alzheimer’s in adults with mild or no cognitive impairment, US researchers say.

Their multicentre study involved 152 adults over the age of 50, of whom 69 had normal cognitive function, 52 had mild cognitive impairment and 31 had probable Alzheimer’s.

The investigators scanned participants’ brains using the radioactive dye florbetapir which binds to the beta-amyloid plaques present in

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