Abstract: Radiation-induced liver disease is characterized structurally by veno-ocelusive disease. Low attenuation areas of liver on noncontrast CT were old,erred in the patients with normal or cirrhosis liver after delivered eonformal radiotherapy. In the patients with fatty infiltration of the liver, CT showed relative increased density in the treatment portal. Enhanced pattern of irradiation-induced hepatic disease are different between normal liver and cirrhosis liver. CT appearance of irradiation-induced hepatic injury is related to primary liver disease.