Tests - diagnosing Alzheimer's disease

There is no basic test for diagnosing Alzheimer's disease, so the diagnosis is usually based on ruling out other conditions. You may have blood tests and a physical examination to rule out other medical conditions that could be causing your symptoms.

If your doctor suspects Alzheimer's disease, you may also be given a brain scan, which will look for changes in your brain. This could be:

- a [computed tomography (CT) scan](../ct-scan) - where several X-rays of your brain are taken at slightly different angles, and a computer is used to put the images together

- a [magnetic resonance imaging (MRI) scan](../magnetic-resonance-imaging-mri) - where a strong magnetic field and radio waves are used to produce detailed images of the inside of your brain