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Health Issue: Alzheimers


Doctors can accurately diagnose 90 percent of Alzheimer's cases. Alzheimer's disease can be diagnosed with complete accuracy only after death, when microscopic examination of the brain reveals plaques and tangles.

To help distinguish Alzheimer's disease from other causes of memory loss, doctors typically rely on the following types of tests.

Lab tests
Blood tests may be done to help doctors rule out other potential causes of the dementia, such as thyroid disorders or vitamin deficiencies.

Neuropsychological testing
Sometimes doctors undertake a more extensive assessment of thinking and memory skills. This type of testing, which can take several hours to complete, is especially helpful in trying to detect Alzheimer's and other dementias at an early stage.

Brain scans
By looking at images of the brain, doctors may be able to pinpoint any visible abnormalities — such as clots, bleeding or tumors — that may be causing signs and symptoms. Positron emission tomography (PET) can reveal areas of the brain that may be less active and the density of amyloid plaques.



Positron emission tomography (PET). During a PET scan, you'll be injected with a low-level radioactive material, which binds to chemicals that travel to the brain. You lie on a table while an overhead scanner tracks the radioactive material. This helps show which parts of your brain aren't functioning properly. The test is painless and can be particularly useful in distinguishing between different types of dementia.

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