PET and SPECT Imaging of Epilepsy: Technical Considerations, Pathologies, and Pitfalls

Area of Science:

• Neurology
• Radiology
• Nuclear Medicine

Background:

• Epilepsy arises from diverse pathologies, often challenging to localize using standard methods.
• Clinical semiology, electroencephalogram (EEG), and magnetic resonance imaging (MRI) may not always pinpoint the structural seizure focus.
• Accurate localization is critical for effective patient management and surgical planning.

Purpose of the Study:

• To highlight the complementary role of functional radionuclide imaging in epilepsy diagnosis.
• To emphasize the importance of understanding radiopharmaceuticals and imaging techniques.
• To underscore the necessity of this modality when structural imaging is discordant or inconclusive.

Main Methods:

• Review of functional radionuclide imaging techniques used in epilepsy.
• Analysis of the spectrum of disease processes detectable by these methods.
• Discussion of potential pitfalls in interpretation.

Main Results:

• Functional radionuclide imaging provides essential complementary data to structural imaging.
• It is particularly valuable in cases where MRI and EEG findings are inconclusive or conflicting.
• Knowledge of specific radiopharmaceuticals and techniques enhances diagnostic accuracy.

Conclusions:

• Functional radionuclide imaging is indispensable for comprehensive epilepsy evaluation.
• It significantly aids in identifying the seizure focus, improving surgical planning.
• A thorough understanding of nuclear medicine principles is vital for neurologists and radiologists.