结节型肝细胞癌的螺旋CT多期扫描

目的：描述结节型肝细胞癌的螺旋ＣＴ动脉期、门脉期和延迟期增强特点，比较各期的病灶检出率，重点评价动脉期、延迟期的价值。方法：２６例结节型肝细胞癌病人行螺旋ＣＴ双期、三期动态扫描后，观察病灶的强化方式，统计各期病灶检出数。结果：２６例基于手术病理和影像方法共发现４５ 个病灶，螺旋ＣＴ多期扫描共发现４２个，平扫、肝动脉期、门脉期、延迟期及三期合计的检出率分别为６６．７％ 、８６．７％ 、７１．１％ 、６５．２％ 、９３．３％ 。动脉期检出敏感性明显高于其他各期，三期结合可明显提高对结节型肝癌的检出率。结论：螺旋ＣＴ多期动态扫描能显示肝细胞癌的增强特点，明显提高结节型肝细胞癌的检出敏感性。

Nodular Hepatocellular Carcinoma(HCC)on Multi-phase Helical CT

Objective:To evaluate the characteristic appearances of nodular hepatocellualr carcinoma(HCC)on multi-phase helical CT,and to compare the detected rate of nodular HCC on three phase,especially to eveauate the effectiveness of arterial phase and delayed phase.Methods:Multi-phase helial CT of the liver was done in 26 patients with nodular HCCs.The morphology and characteristics on contrast enhanced scans were analysed,and the number of the detected lesions was calculated on each phase.Results:42 nodular HCCs of total 45 nodular HCCs found on surgical operation and other imaging methods were detected on multi-phase images.The detected rate on plain scans arterial,portal,delayed phase and three phase were 66.7%,68.7%m71.1%,65.2%m93.3% respectively.The significant difference of sensitivity was found between arterial phase and each other phase,and combination of three phase could statistically improve the detectability of nodular HCCs.Conclusion:Multi-phase hecical CT can fully show the enhanced chractistics of HCC and improve considerably the detectabiligy of nodular HCCs.