Abstract
目的 探讨CT低张增强扫描在胆总管壶腹部梗阻诊断中的应用价值.方法共47例胆总管壶腹部梗阻患者,其中男28例,女19例,年龄为34~78岁,平均年龄为52.2岁.胆总管扩张分轻度(9 mm≤管径<10 mm)、中度(10 mm≤管径<15 mm)及重度(管径≥15 mm).肝内胆管扩张的形态分软藤状、残根状和不典型3类.结果胆总管轻度扩张17例,其中3例为炎症性狭窄,14例为结石; 中度扩张18例,15例为结石,3例为壶腹癌;重度扩张12例,均为壶腹癌.肝内胆管软藤状扩张15例,均为壶腹癌;残根状扩张19例,均为胆总管结石;不典型肝内胆管扩张13例,其中3例为炎症性,10例为结石.壶腹癌中9例可见 双管征 ,5例可见双环征,3例可见半月征,8例可见乳头状软组织结节影.29例结石在梗阻部位可见点状略高密度影.3例炎症性狭窄显示梗阻端胆管逐渐变细.结论 CT低张增强扫描在胆总管壶腹部梗阻的诊断和鉴别诊断中很有价值。
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