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Brain imaging during seizure: ictal brain SPECT.
1Department of Radiology, Wayne State University School of Medicine, Children's Hospital of Michigan, Detroit 48201, USA.
Indian Journal of Pediatrics
|April 20, 2000
Summary
Single photon computed tomography (SPECT) helps locate epileptic seizures in children with complex partial epilepsy (CPE). This non-invasive imaging technique is cost-effective and sensitive for identifying the seizure focus.
Area of Science:
- Pediatric Neurology
- Nuclear Medicine Imaging
Background:
- Medically intractable complex partial epilepsy (CPE) in children poses significant management challenges.
- Accurate presurgical localization of the epileptic focus is crucial for successful surgical intervention.
Purpose of the Study:
- To review the role of ictal single photon computed tomography (SPECT) in the presurgical localization of epileptic foci in pediatric CPE.
- To evaluate the sensitivity and cost-effectiveness of SPECT for identifying seizure origins.
Main Methods:
- Utilized 99mTechnetium Neurolite, a lipophilic radiotracer, injected during seizures in children with CPE.
- Correlated SPECT imaging with video electroencephalography (EEG) monitoring.
- Analyzed regional cerebral perfusion patterns during ictal events.
Main Results:
- Ictal SPECT studies demonstrated hyperperfusion at the seizure focus.
- Observed associated hypoperfusion in adjacent cortical and white matter regions.
- Identified characteristic patterns of hyperperfusion in contralateral motor cortex, ipsilateral basal ganglia/thalamus, brainstem, and contralateral cerebellum.
Conclusions:
- Ictal brain SPECT is a valuable, non-invasive, and cost-effective tool for presurgical localization of epileptic foci in pediatric CPE.
- SPECT imaging provides sensitive diagnostic information for guiding epilepsy surgery.