A PET scan provides information about how an organ or system in the body is working, and a SPECT scan shows how blood flows to tissues and organs – both scan can assist helping to identify seizure onset zones in the brain. Or MRI and not have a diagnosis of epilepsy.Īdditional tests such as SPECT (single-photon emission computed tomography) and PET (positron emission tomography) scans may also be recommended. It is also possible for a person to have an ‘abnormal’ CT But, just like anĮEG, the scans can show up as being normal in people who have had a witnessed Or changes as a result of a tumour or traumatic brain injury. May be small changes in how the brain tissue developed, blood vessel changes, Sometimes, a possible cause for seizure activity can be seen on a scan. MRI and CT scans show how a person’s brain is structured and, However, an EEG can be abnormal forĪ variety of reasons unrelated to seizures. To the doctor during the diagnosis period. An abnormalĮEG can suggest that a person is more likely to have seizures which can be helpful – it doesn’t mean that a seizure has not occurred at another time. Simply indicate that seizure activity was not occurring when the test was taken This means that when an EEG comes back normal, it could However, electrical changes are often only
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