Clinical Application of More-phase Spiral CT in Small Hepatocellular Carcinoma and Small Hepatic Hemangioma

Objective: To investigate the enhanced spiral CT features of SHCC and SHHE,and the changing of these features with time. Materials and Methods: of 50 cases with SHCC(15/50)and SHHE (35/50), 19 cases were surgically and pathologically proved, and the others were clinically diagnosed. Plain scanning, single-level dynamic scanning of the target section during hepatic arterial phase (delaying 25-30 sec.), portal venous phase scanning(delaying 60-70 sec.)of the whole liver, and equilibrium scanning of the target section here performed. The dynamic changes of CT features were observed and analyzed. Results: 35 cases with SHHE were found in 44 focuses. Peripheral enhancement significantly of the lesion were found 30(30/44) focuses on the arterial phase scan and to fill up by degrees from the periphery of the lesion to center. Hemogenous enhancement was seen in 22(22/44) focuses and 2(2/44) focuses did not showed enhance-ment on the arterial phase and the portal venous phase scan. 42(42/44)cases with SHHE showed high or equal density compare with the liver density on the equilibrate phase scan. 15 cases with SHCC were found in 18 focus. Hemogenous enhancement was seen in 14 (14/18) focuses on the arterial phase scan and did not showed enhance-ment on the portal venous phase scan. 2(2/18) cases with SHHE showed hemogenous or no hemogenous enhancement on the equilibrate phase scan. 16(16/18) cases with SHCC showed low density compare with the liver density on the equilibrate phase scan. Conclusion: According to the enhanced spiral CT features and the changing of these features with time, the most of SHCC and SHHE were diagnosed.