Single-Proton Emission Computed TomographyDefinition An imaging test of blood perfusion in various areas of the brain to determine seizure origin. Alternative Names SPECT; Ictal SPECT; InterIctal SPECT How the test is performed A SPECT scan is often used to visualize the brain's cerebral blood flow and thereby, indicate flow activity patterns in the brain. SPECT generates two-dimensional images of a specific region in the brain by detecting the presence of a radioactive compound given prior to the test. The image produced is a collection of data acquired over time following administration of a radioactive tracer. The tracer is injected at the onset of a seizure so that information of blood flow during the seizure can be obtained. Thirty minutes after the injection, a brain scan will follow. This usually takes approximately one hour. How to prepare for the test There is no need for special preparation prior to this test. The test itself can only be completed if you have a seizure during the test. An I.V. will be inserted in which the radioactive compound will be administered. Why the test is performed Sometimes in addition to the EEG (brain wave test) and standard brain imaging such as MRI or PET scan, SPECT scan can be helpful to determine the area of seizure focus especially in the deep regions of the brain. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright ©2005. Any duplication or distribution of the information contained herein is strictly prohibited. Please discuss with your doctor any questions or concerns you may have. |
||
|
Copyright © 2005 University of California, San Francisco - Department of Neurology
|
||