Which imaging modality is preferred for evaluating structural brain lesions in epilepsy?

Which imaging modality is preferred for evaluating structural brain lesions in epilepsy?

• A. CT
• B. PET
• C. MRI
• D. Ultrasound

Answer: (C)

Magnetic resonance imaging provides superior soft tissue contrast and the highest spatial resolution among common brain imaging methods, making it the best choice for identifying structural lesions that can cause epilepsy. Its multiplanar, high-detail brain view with various sequences (like T1, T2, FLAIR, diffusion, and often gadolinium-enhanced imaging) detects subtle abnormalities such as mesial temporal sclerosis, cortical dysplasia, tumors, and vascular malformations that CT can miss. While CT is fast and useful for acute processes or bone injury, it has lower sensitivity for subtle cortical and hippocampal pathologies. PET offers metabolic information to help localize epileptogenic regions in difficult cases but does not provide the detailed anatomy MRI offers. Ultrasound has limited usefulness for intracranial imaging in adults due to the skull. Therefore MRI is the preferred modality for evaluating structural brain lesions in epilepsy.

Magnetic resonance imaging provides superior soft tissue contrast and the highest spatial resolution among common brain imaging methods, making it the best choice for identifying structural lesions that can cause epilepsy. Its multiplanar, high-detail brain view with various sequences (like T1, T2, FLAIR, diffusion, and often gadolinium-enhanced imaging) detects subtle abnormalities such as mesial temporal sclerosis, cortical dysplasia, tumors, and vascular malformations that CT can miss. While CT is fast and useful for acute processes or bone injury, it has lower sensitivity for subtle cortical and hippocampal pathologies. PET offers metabolic information to help localize epileptogenic regions in difficult cases but does not provide the detailed anatomy MRI offers. Ultrasound has limited usefulness for intracranial imaging in adults due to the skull. Therefore MRI is the preferred modality for evaluating structural brain lesions in epilepsy.