chd=dilated common hepatic duct.

cbd=dilated common bile duct.

arrow=represent narrowed,displaced segment

due to extrinsic compression.

note,non visualisation of cystic duct and gall bladder.

Reference:BiblioMed Textbook-Computed Body Tomography

dense calcified mass(stone).

s=stent into common bile duct.

Reference:BiblioMed Textbook-Computed Body Tomography