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Figure 7a. Residual calculus in a 71-year-old woman after cholecystectomy. (a) Coronal MIP image from a 3D respiratory-triggered T2-weighted fast SE restore data set shows slight dilatation of the intrahepatic bile ducts but does not clearly depict the distal part of the common bile duct (arrows). The round or oval high-signal-intensity structures are cysts in the liver. (b) Thin-section source image obtained with the 3D fast SE restore sequence shows, much more clearly than in a, a filling defect with hypointense signal suggestive of a stone in the distal part of the common bile duct (arrow). (c) Axial free-breathing T2-weighted HASTE image shows a round low-signal-intensity structure (arrow) surrounded by high-signal-intensity fluid in the distal part of the common bile duct.
