Can a person with brain damaged have a normal scan?

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PET (Positron Emission Tomography) is a safe, effective and non-invasive diagnostic imaging technique. It provides images that show chemical and functional changes within the brain. PET is very sensitive and it can detect changes in the brain associated with seeing, hearing and thinking. Similarly, it can detect changes in the brain associated with certain diseases that cannot be seen with other imaging methods. For example, in patients with epilepsy, it can show which part of the brain is responsible for the seizures, even if the patient had a normal MR or CT of the brain. Another example: in patients who have been treated for brain tumors, PET helps define if the tumor is still growing or is inactive. So brain damage would be a fairly easy assessment with this technique.