retrograde cholangiography

例句：

1. 1.The patient underwent retrograde cholangiography to evaluate the bile ducts.
   患者接受了逆行胆管造影术以评估胆管。
2. 2.This procedure is commonly used for detecting blockages in the bile ducts during surgery.
   这种程序常用于手术中检测胆管的阻塞。
3. 3. The doctor recommended this test to determine if there was any obstruction in the bile ducts.
   医生推荐了这项检查，以确定胆管是否有任何阻塞。