RAG Files/Alzheimer's Disease - Diagnosis - 6.txt

Psychological tests for depression are used, since depression can either be concurrent with Alzheimer's disease (see Depression of Alzheimer disease), an early sign of cognitive impairment,[142] or even the cause.[143][144]

Due to low accuracy, the C-PIB-PET scan is not recommended as an early diagnostic tool or for predicting the development of Alzheimer's disease when people show signs of mild cognitive impairment (MCI).[145] The use of 18F-FDG PET scans, as a single test, to identify people who may develop Alzheimer's disease is not supported by evidence.[146]