In the Far 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 October 1987 in the Department of diagnostic Radiology Seoul National university hospital. Among these 136 patients 30 had pre-angiographic CT angiography withlipiodol infusion in hepatic artery and post-angiographic lipiodol CT. Authors compared the detectability of small tumor nodules (less than 1cm in diameter)between CT angiography and lipiodol CT in these 30 patients. The results were as follows: 1.The 30 cases are composes 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 cases of 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 is very useful in detec-tion of tumors at subdiaphragmatic portion resection margin and periphery of the liver. 4. It is very difficult to compare the detectability of small nodules between CT angiography and lipiodol CT in diffuse type (6 cases). And there is no difference in number of detected nodules in 9 cases of nodular type (24 cases).