螺旋CT双期扫描对胆囊癌和慢性胆囊炎的鉴别

目的 探讨螺旋CT双期扫描在胆囊癌和慢性胆囊炎中的表现特征及其对两者的鉴别诊断价值。方法 收集我院经手术与病理证实的胆囊癌和慢性胆囊炎各30例为研究对象，分析两者在螺旋CT双期扫描的征象和强化特点。结果 30例胆囊癌病例中表现为胆囊壁增厚型11例(33．7％)、腔内结节型6例(20．0％)和肿块型13例(43．4％)。胆囊癌胆囊壁增厚最常见的强化方式是动脉期为高密度，门静脉期为等或高密度，常伴有临近肝脏浸润，局部淋巴结和肝内结节样转移。慢性胆囊炎胆囊壁轻度增厚，其内壁光滑，最常见的强化方式是动脉期和门静脉期均为等密度，胆囊窝内常出现边界清晰的低密度曲线影。结论 螺旋CT双期扫描对于胆囊癌的诊断及其与慢性胆囊炎的鉴别诊断有很重要的价值。

Gallbladder Carcinoma and Chronic Cholecytisis:Differential Diagnosis with Two-phase Spiral CT

Objective To investigate the features of gallbladder carcinoma in two-phase spiral CT, and to analysis the values of two-phase spiral CT for the differential diagnosis between gallbladder carcinoma and chronic cholecystitis. Methods The two-phase spiral CT manifestations of 30 cases of gallbladder carcinoma, proved by surgery and pathology, and 30 cases of chronic cholecystitis were analyzed. Results According to the CT findings, the gallbladder carcinoma was categorized into 3 types: intraluminal mass of gallbladder in 6 out of 30 (20.0%), thickening of the gallbladder wall in 11 (33.7%), and mass replacing the normal gallbladder in 13(43.4%). The most common enhancement patterns of the wall in gallbladder carcinoma were hyperattenuation during the arterial phase, while isoattenuation with the adjacent hepatic parenchyma during the venous phase; or hyperattenuation during both phases. The most common enhancement pattern of the wall in chronic cholecystitis was isoattenuation during both phases, with clear hypoattenuation linear shadow in the gallbladder fossa. Other ancillary features of gallbladder carcinomas included: infiltration of the adjacent parenchyma, local lymphadenopathy and intrahepatic metastasis. Conclusion Two-phase spiral CT scan can identify the features of the gallbladder carcinoma and is helpful for the differential diagnosis of these two different disease entities.