关键词: 胆道闭锁, 超声检查, 产前诊断, 产后诊断

Abstract: Ultrasound is the first choice for biliary atresia due to its unique advantages. With the increasing professionalization of
ultrasound doctors and the improvement of technical equipment, ultrasound observation of children with biliary atresia has become
more and more detailed, and scholars have continued to study on this and proposed different abnormal image changes. The abnormal
image changes that biliary atresia can show in prenatal ultrasound include cystic biliary atresia and non-visualization of gallbladder.
Ultrasound diagnosis of postnatal biliary atresia should comprehensively analyze multiple imaging manifestations, including the
presence of the gallbladder, changes in the size, shape, and wall of the gallbladder, gallbladder contraction status after eating, triangle
signs, subcapsular blood flow, and hepatic artery dilatation. This article reviews the advances in ultrasound findings and diagnostic
value of biliary atresia before and after birth.

Key words: biliary atresia, ultrasound, prenatal diagnosis, postnatal diagnosis