Neuroimaging methods in Epilepsy of Temporal Origin

Area of Science:

• Neurology
• Radiology
• Medical Imaging

Background:

• Temporal Lobe Epilepsy (TLE) is the most common adult focal epilepsy.
• Accurate localization of the epileptogenic zone is crucial for surgical candidacy.
• Standard MRI fails to detect hippocampal sclerosis in over 30% of TLE patients, complicating presurgical assessment.

Purpose of the Study:

• To evaluate the role of advanced imaging techniques in TLE diagnosis.
• To improve the accuracy of lateralization and localization of the epileptogenic focus.
• To enhance presurgical assessment in medically intractable TLE.

Main Methods:

• Utilizing advanced Magnetic Resonance Imaging (MRI) techniques including 1H-MRS, DWI, DTI, DSCI, and fMRI.
• Employing nuclear medicine studies such as Single-Photon Emission Computed Tomography (SPECT) and Positron Emission Tomography (PET) imaging.
• Integrating structural MRI with functional and molecular imaging data.

Main Results:

• Advanced MRI techniques offer physiological and metabolic insights into brain tissue.
• SPECT and PET imaging provide data on altered metabolic activity at seizure foci.
• These advanced methods promise improved accuracy in localizing the epileptogenic zone.

Conclusions:

• Advanced MRI, SPECT, and PET are essential for TLE diagnostics when structural MRI is indeterminate.
• These techniques are vital when MRI, clinical, and electrophysiological findings are discordant.
• They aid in precise identification of the epileptogenic area for surgical planning.