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笔者通过对３５例阻塞性黄疸的ＣＴ所见，提出了胆道扩张征象可作为鉴别肝内、外阻塞性黄疸的可靠指标，再结合临床及ＣＴ的其它征象，可更加提高其鉴别诊断准确率。本文对这些指标的可靠性进行了重点讨论。另通过对２８例肝外梗阻的胆管扩张形态特征进行分析，发现其扩张规律为逐级递减规律，提出了该特点是鉴别胆总管囊肿的主要指征，即后者的胆道扩张为局部性或节段性。本文对良、恶性病变所致的胆道扩张形态亦进行了对照分析，发现二组之间无显著性差异。
The author of the 35 cases of obstructive jaundice seen CT, the proposed signs of biliary dilatation can be used as a reliable indicator of intrahepatic and extra-obstructive jaundice, combined with clinical and other CT signs can be further increased its differential diagnosis accuracy. This article focuses on the reliability of these metrics. Another 28 cases of extrahepatic obstruction bile duct dilatation morphological characteristics were analyzed and found that the expansion of the gradual decline of law, proposed the characteristics of the main indications for the identification of choledochal cyst, which is the latter part of the biliary dilatation is localized or Segmental. This article on benign and malignant lesions caused by the biliary dilatation morphology were also analyzed and found no significant difference between the two groups.