Single photon emission computed tomography in epilepsy

Michael D. Devous, Robert F. Leroy, Richard W. Homan

Research output: Contribution to journalArticle

84 Citations (Scopus)

Abstract

Functional brain imaging by either single photon emission computed tomography (SPECT) or positron emission tomography (PET) is now a well-established technique in the diagnosis and evaluation of the epilepsies. Perhaps only in stroke have these emerging technologies proven of greater significance. Scalp, cortical, or depth electroencephalographic (EEG) data previously have been the gold standards for the localization and subcharacterization of epileptic activity in the human brain. Yet, they are fraught with difficult interpretations, technical difficulties, and limitations in sampling accuracy. Both SPECT and PET have localizing power approaching that of combined scalp and depth EEG. In the following discussion, a brief overview of the results of PET investigations in epilepsy is presented as background and comparative material for the concurrent and, more recently, dominant role of SPECT in evaluating patients with seizure activity. SPECT results in the interictal state in partial and generalized seizure activity are reviewed followed by an analysis of the role of ictal SPECT imaging in epilepsy. Next, relationships among interictal hypoperfusion (or hypometabolism) and computed tomography, magnetic resonance imaging, neuropathology, clinical severity, and cognitive function are discussed. The role of perfusion or metabolism imaging in the management of antiepileptic pharmacotherapy is also discussed, and the potential for receptor imaging in the evaluation of the epilepsies is examined. Finally, application in pediatric epilepsy are presented.

Original languageEnglish (US)
Pages (from-to)325-341
Number of pages17
JournalSeminars in Nuclear Medicine
Volume20
Issue number4
DOIs
StatePublished - 1990

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Single-Photon Emission-Computed Tomography
Epilepsy
Positron-Emission Tomography
Scalp
Seizures
Stroke
Functional Neuroimaging
Human Activities
Anticonvulsants
Cognition
Perfusion
Tomography
Magnetic Resonance Imaging
Pediatrics
Technology
Drug Therapy
Brain

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

Single photon emission computed tomography in epilepsy. / Devous, Michael D.; Leroy, Robert F.; Homan, Richard W.

In: Seminars in Nuclear Medicine, Vol. 20, No. 4, 1990, p. 325-341.

Research output: Contribution to journalArticle

Devous, Michael D. ; Leroy, Robert F. ; Homan, Richard W. / Single photon emission computed tomography in epilepsy. In: Seminars in Nuclear Medicine. 1990 ; Vol. 20, No. 4. pp. 325-341.
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