MRI scan reveals cognitive decline in Parkinson's patients

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An MRI scan that detects atrophy patterns in the brains of Alzheimer's patients also can reveal cognitive decline in Parkinson's patients, a new study finds.  Investigators say this technology can predict which patients with Parkinson's disease will experience long-term cognitive decline or develop dementia in the future. About 4 in 5 Parkinson's patients typically develop dementia as the disease progresses. The study was published online in the journal Brain.