Both abdominal CT and abdominal MRI have their own advantages and different imaging principles can complement each other, so it is not possible to determine which one is better. In the case of gallbladder stones and common bile duct stones, if there is less calcium in the stone composition and the stone density is low, abdominal CT examination will not detect the stones, which is also a common clinical situation. At this time, it can be combined with ultrasound or abdominal MRI. Abdominal MRI can also perform bile duct imaging to understand the intrahepatic bile duct, common hepatic duct and common bile duct more visually, so that the diagnosis can be more clear and avoid missed diagnosis.