Objective To study CT findings and relative factors of abnormal liver perfusion in hepatocellular carcinoma(HCC).Methods During October 1998～February 2001, spiral CT scan was perfomed in patients with HCC, of which 51 with and 51 without portal carcinomatous embolus were randomly selected. Following plain spiral CT scan of the liver, arterial phase scanning was started at 20 s, after contrast injection. CT findings were observed and the relative factors of abnormal liver perfusion of HCC were analyzed.Results Abnormal liver perfusion in arterial phase was seen in 28 cases, presenting as irregular patchy high density. CT demonstrated that formation of abnormal liver perfusion was related to location of tumors, existing of portal embolus and location of portal embolus.Conclusion Arterial phase spiral CT scanning is helpful in detecting the abnormal liver perfusion and accurately judging the extent of the tumors. This information is helpful to clinical treatment.

Objective To research the diagnostic value and the relative factors of abnormal hepatic perfusion in hepatic abscess. Methods During February 1998~ October 2003, spiral scan was perfomed in 34 patients with hepatic abscess, of which 34 patients with hepatocellular carcinoma without portal carcinomatous embolus were randomly selected. Following plain spiral CT scan of the liver, arterial phase scanning was started at 20 s after contrast injection. CT findings were observed and the relative factors of abnormal hepatic perfusion of hepatic abscess were analyzed. Results Abnormal hepatic perfusion in arterial phase was seen in 26 cases, of which 18 cases in hepatic abscess and 8 cases in hepatocellular carcinoma, presenting as irregular patchy high density. CT demonstrated that formation of abnormal hepatic perfusion was related to the course of diseases, but not related to the location of the lesions. Conclusion Abnormal hepatic perfusion is another important enhanced CT sign and is valuable in the diagnosis of hepatic abscess.