In the Far East including Korea, the hepatocellular carcinoma(HCC) is common and its prognosis is very poor unless the malignancy is detected early and resected radically. TAE of HCC was done in 136 patients, from February, 1987 to Octobe, 1987, in the department of Diagnostic Radiology, Seoul National University Hospital. Among these 136 patients 30 had pre-angiographic CT, angiography with lipiosol infusion in hepatic artery, and post-angiographic lipiodol CT. Authors compared the detectability of small tumor nodules(less than 1cm indiameter) between CT, angiography, and lipiodol CT in these 30 patients. The results were as follows: 1. The 30 cases are composed of 14 of solitary nodular, 10 of multinodular, and 6 of diffuse type viewed on pre-angiographic CT. 2. Lipiodol CT is superior in detection of small nodule to conventional CT in 10 cases. (1) Six among 14 casesof solitary nodular type show another nodules on lipiodol CT (2) Four in 10 cases of multinodular type represent additional nodules. 3. Lipiodol CT is also superior in small nodule detection to angiography in 7 cases, and isvery useful in detection of tumors at subdiaphragmatic portion, resection margin, and periphery of the liver. 4.It is very difficult ot compare the detectability of small nodules between CT, angiography, and lipiodol CT indiffuse type (6 cases). And there is no difference in number of detected nodules in 9 cases of nodular type(24cases).