腔内CEUS显著提高胆道梗阻诊断准确率，尤其是肝总管及以上部位

Translation:

'First-order intrahepatic bile ducts and above; horizontal level of the hepatic duct; common bile duct and below.'

This is a set of research data from our preliminary study. In this table, we can see that compared to conventional ultrasound, intracavitary CEUS significantly improves the diagnostic level of bile duct obstruction sites, especially in the diagnosis of obstructions in the hepatic duct and above, with an accuracy rate of 100%.