进展期胃癌在螺旋CT双期扫描中强化特征的研究  

Study of the Imaging Characteristics of Biphasic Enhanced Helical CT in Advanced Gastric Carcinoma

作　　者：庄治国[1] 冯琦[1] 许建荣[1] 

机构地区：[1]第二医科大学附属仁济医院放射科,上海200127

出　　处：《放射学实践》2006年第6期569-572,共4页Radiologic Practice

摘　　要：目的:探讨进展期胃癌在螺旋CT双期扫描中的强化特征。方法:60例进展期胃癌患者行螺旋CT双期增强扫描,分析肿瘤的强化特征,测定肿瘤区域的CT强化值,并与术后病理结果进行对比分析。结果:60例进展期胃癌患者中,12例(20%)肿瘤病灶呈单层强化,48例(80%)呈2～3层的分层强化。在分层强化的肿瘤病灶中,高分化腺癌组与低分化腺癌或未分化癌组病灶中层门脉期CT强化值差异有显著性意义(P<0.05)。黏液癌或印戒细胞癌病灶中层的CT强化值较低,有时出现“靶征”。肿瘤病灶中层门脉期的强化程度高于动脉期,差异有显著性意义(P<0.05)。结论:进展期胃癌有不同的强化特征,与病理学类型及分化程度有一定的关系。Objective：To investigate the imaging characteristics of two-phase enhanced hecical CT in advanced gastric carcinoma. Methods： Two-phase enhanced helical CT of the stomach were performed in 60 patients with advanced gastric carcinoma and their imaging characteristics were analyzed. The attenuation value of tumor after enhancement was measured, and was correlated with surgical as well as pathologic findings. Results： Of these 60 patients, single layer enhancement was showed in 12 cases （20%）;2 -3 layers stratified enhancement in 48 cases （80%）. Among the lesions with stratified enhancement, for attenuation value of the middle layer in the portal venous phase,there was statistically significant difference between highly differentiated and poorly differentiated or undifferentiated adenocarcinoma （P〈0.05）. The attenuation value of the middle layer in mucoid carcinoma or signet-ring cell carcinoma was lower than the other subtypes,＂target sign＂ might be seen. The attenuation value of the middle layer in the portal venous phase was higher than that in the arterial phase,with statistically significant difference （P〈0.05）. Conclusion： The enhancement characteristics of advanced gastric carcinoma are varied and are correlated with their histo-pathology subtypes and degree of differentiation.

关 键 词：胃肿瘤 体层摄影术 X线计算机 病理学 

分 类 号：R735.2[医药卫生—肿瘤]