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Fig. 4A. —38-year-old man who was referred for MR imaging with elevated liver function tests. Coronal half-Fourier acquisition single-shot turbo spin-echo image (TR/TE, infinite, 62; refocusing pulse, 120°) shows abrupt change in caliber of distal common bile duct suggestive of anastomotic stricture (white arrow). Central signal loss in common bile duct is due to presence of biliary catheter (black arrow).