Figure 10c. Anastomotic stricture of the bile duct. (a) Right paramedian sagittal US image shows focal narrowing of the middle portion of the common bile duct (arrow) at the surgical anastomosis. (b) Corresponding image from endoscopic retrograde cholangiopancreatography shows the narrowing (arrow). (c) Color and spectral Doppler image of the main hepatic artery shows a normal waveform.