A PET (positron emission tomography) scan is a test that shows how your organs are functioning. A brain PET is done to look at which areas of the brain are active when a dye is injected. When a part of the brain is very active, it will appear bright on the PET scan. If it is less active or damaged in some way, it will appear darker. This helps to identify which part of the brain may be responsible for seizure activity.

How to prepare for a brain PET

For six hours before the exam, do not have anything to eat or drink aside from water. Sugar can alter the results of the test. An IV will be placed in your arm for the injection of a special dye that will be seen in the brain during the PET scan. On the day of the exam, take your medications as prescribed by your physician with small sips of water.