胆道梗阻性病变较常见，其病因复杂，有关影像诊断的文献资料通常集中于探讨梗阻病变本身的显示方式和影像特征，就诊断而言，这无疑是最重要的。也有少数作者根据不同病变所致肝内胆管扩张形态方面的差异，分析良恶性胆道扩张的CT特征，以此作为鉴别诊断中重要的间接征象。笔? Biliary tract obstructive lesions are more common and their etiology is complex. The literature on imaging diagnosis is usually focused on the display methods and image features of obstructive lesions. This is undoubtedly the most important in terms of diagnosis. There are also a few authors to analyze the CT features of benign and malignant biliary dilatation based on the differences in intrahepatic bile duct dilation patterns due to different lesions as an important indirect sign in differential diagnosis. pen?