Detecting biliary complications following liver transplantation with contrast-enhanced ultrasound

Figure 2 A 46-year-old female patient who underwent liver transplantation due to liver failure. Three months postoperatively, an ultrasound examination revealed ischemia of the bile duct wall near the porta hepatis region. A: Color Doppler ultrasound indicated a reduced hepatic artery resistance index in the right hepatic artery; B: Intravenous contrast-enhanced ultrasound showed mild stenosis of the upper segment of the common bile duct, mild dilation of the intrahepatic bile ducts, and low perfusion of the bile duct wall arteries near the porta hepatis region during the arterial phase (indicated by the arrow).