PET Scans Helpful, But Not Definitive for Alzheimer's Diagnosis

New guidelines address which patients might benefit from imaging test for brain plaque

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"On the downside, while scanning of healthy 'worried well' people is explicitly discouraged and disapproved, that is already happening and I am not sure that these guidelines will attenuate that demand," he said. "Persistent people will always find someone to write the script. So, this challenge remains."

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To learn more about Alzheimer's disease, visit the U.S. Department of Health and Human Services.

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