肝细胞癌的双时相螺旋CT扫描

目的：描述肝细胞癌的双时相螺旋ＣＴ的特征，评价其应用价值。材料与方法：对４９例肝细胞癌患者进行了双时相螺旋ＣＴ扫描。记录病变增强形态、特征，并与病理和血管造影对照。由两位放射科医生以双盲法观察诊断。结果：７４％的肝细胞癌在动脉期呈高密度，７６％在门静脉期呈低密度。１０例门静脉期等密度的病灶在动脉期均呈高密度。动脉期和门静脉期肝细胞癌的检出率为９１％和８１％。结论：双时相螺旋ＣＴ能显示肝细胞癌的增强特点，并提高病变检出率。可在肝细胞癌的检查中作为常规方法应用。

Two phase helical CT of hepatocellular carcinoma

Purpose:To study the characteristic appearances of hepatocellular carcinoma (HCC) in dual phase helical CT study. Meterials and methods: Dual phase helical CT of the liver was done in 49 patients with known or suspected hepatocellular carcinoma. The morphology and characteristics of enhancement were studied, and compared with histopathologic and angiographic findings. The CT appearances were independently reviewed in a double blind method by two radiologists. Results: 74% of HCC were hyperdense in the arterial phase, 76% were hypodense in portal venous phase. Ten isodense HCC in portal venous phase demonstrated hyperdensity in the arterial phase. The detectability of HCC in the arterial and portal venous phase was 91% and 81%. Conclusion: Dual phase helical CT is a useful method in the detection and characterization of HCC, it can be routinely performed in study of hepatocellular carcinoma.