Background: MRI is clearly the structural imaging modality of choice for investigating patients with epilepsy and is superior to radiographic CT in terms of both sensitivity and specificity, for identification of small lesions and abnormalities of the cerebral cortex. Occasionally, CT may be useful as acomplementary imagingtechnique in the detection of cortical calcifications, particularly in patients with congenital or acquired infections. However, scans must be interpreted in the context of the entireclinical situation. Conventional isotope brain scans do not provide sufficient information about brain structures to identify many lesions associated withseizures, and their use is not recommended.Accurate diagnosis of the cause of seizure in a patient is crucial forfinding an effective treatment. MRI has been shown to be highly sensitiveand specific in identifying the underlying pathology in partial epilepsy. MRImay determine patient selection for surgery and directly affects thepresurgical evaluation and operative strategy. Therefore MRI should beperformed early to avoid unnecessary medication in patients with resectable intracranial mass lesions