ABSTRACT
Neuroimaging has an important role in the investigation and treatment of patients
with epilepsy. Diagnosis of the underlying substrate in a given patient with epilepsy
determines prognosis with higher accuracy than electroencephalography. Neuroimaging
techniques include computed tomography (CT) and magnetic resonance imaging (MRI),
although CT has a diminished role for diagnosis. MRI is the most appropriate imaging
technique in the initial investigation of patients with epilepsy. MRI is the most
sensitive technique for the diagnosis of hippocampal sclerosis, tumors, and malformations
of cortical development. MRI is also critical for neurosurgical planning. Other imaging
techniques such as positron emission tomography (PET) and single photon emission computed
tomography are reserved for patients with intractable epilepsy when surgery is contemplated.
New developments such as MR spectroscopy, receptor PET, and magnetic source imaging
are becoming clinical tools and have the promise of improving diagnosis.
KEYWORD
Epilepsy - neuroimaging - MRI - PET - SPECT