Computed tomography is of prime importance in the diagnosis of epilepsy. In a previous study, one of the authors (Chang) reported that the proportion of organic lesion in epilepsy was approximately 49% according to CT examination. In this article, the authors studied the correlation of EEG and CT findings in 232 epileptic patients, who had been managed in Kyung-Hee University Hospital from October 1977 to March 1981. The patient population consisted of 155 males (66.896) and 77 females (33.2%). Age distribution was broad ranging from 3 months to 72 years and 75% of patients were below the age of 40. The types of epilepsy were centrencephalic epilepsy (145 grand mal and 2 petit mal) ； 64.5% (N=147) and focal epilepsy (6 Jacksonian, 12 T.L.E., and 67 others) ； 36.5% (N=85). Data were analysed and the following results were obtained : 1. There were no statistically significant differen ces in abnormal findings by using EEG ( N = 153, 65.9%) and CT (N=144,62.196) in total epileptic patients. 2. Abnormal CT findings in focal epilepsy (75.3%) was more frequent than that of centren cephalic epilepsy (54.4%). 3. According to the rough subdivision of lesion sites (left, right, or diffuse), concordance rate of sites of abnormal EEG and CT was significantly high (74.1%, p < 0 .01). 4. Focal slowings in EEG was associated with higher proportion of abnormal CT (81.2% ), as compared with focal paroxysms (29.4%).
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