Brain imaging scans, also called neuroimaging scans, are being used more and more to help detect and diagnose a number of medical disorders and illnesses. Currently, the main use of brain scans for mental disorders is in research studies to learn more about the disorders. Brain scans alone cannot be used to diagnose a mental disorder, such as autism, anxiety, depression, schizophrenia, or bipolar disorder.
In some cases, a brain scan might be used to rule out other medical illnesses, such as a tumor, that could cause symptoms similar to a mental disorder, such as depression. Other types of tests are needed for a mental illness to be properly diagnosed. Scientists are studying differences in the brains of people with and without a mental illness to learn more about these disorders. However, at this time relying on brain scans alone cannot accurately diagnose a mental illness or tell you your risk of getting a mental illness in the future.
Some types of brain scans pose health risks due to the radiation they use to create a picture of the brain. Because of these risks, brain scans should not be used if you don’t need them. In addition, these scans are very expensive, and unless your doctor prescribes such a test, they may not be fully covered by health insurance.