title: CT cholangiography: assessment of feasibility and diagnostic reliability.
abstract: OBJECTIVE
  To assess the reliability of computed tomography (CT) cholangiography in evaluating the anatomy of the intrahepatic biliary ducts.
  
  
  METHODS
  Twenty-eight patients underwent CT cholangiography at the National Cancer Institute of Milan, Italy. Twenty-one patients were candidates for liver surgery and seven had suspected postoperative biliary complications. The patients had not dilatation of the intrahepatic biliary ducts at US examination and bilirubin levels were not higher than 2 mg/dl. To define the reability of the CT cholangiography, a scoring system (from 0 to 3) was used for each order of biliary branches.
  
  
  RESULTS
  In all cases, it was technically possible to carry out the CT cholangiography according to the protocol. There were no adverse reactions to the contrast agent. Two radiologists gave the maximum score of 3 for visualisation of the first- and second-order biliary branches in all cases. For visualisation of third- and fourth-order biliary branches the maximum score of 3 was given in 18 patients, a score of 2 in 8 patients and a score of 1 in 2 patients. Three anatomical variants of biliary ducts were detected. CT cholangiography was diagnostic in all seven cases of suspected postoperative biliary complications.
  
  
  CONCLUSIONS
  Our work confirms the high spatial resolution and reability of CT cholangiography in evaluating the intrahepatic biliary anatomy of patients who are candidates for liver surgery, with non-dilated biliary ducts and with bilirubin levels no higher than 2 mg/dl.
authors.affiliation: Department of Radiology, National Cancer Institute, via Venezian 1, Milan 20100, Italy. carlo.morosi@istitutotumori.mi.it
authors.forename: Carlo
authors.initials: C
authors.lastname: Morosi
authors.forename: Enrico
authors.initials: E
authors.lastname: Civelli
authors.forename: Carlo
authors.initials: C
authors.lastname: Battiston
authors.forename: Marcello
authors.initials: M
authors.lastname: Schiavo
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Mazzaferro
authors.forename: Aldo
authors.initials: A
authors.lastname: Severini
authors.forename: Alfonso
authors.initials: A
authors.lastname: Marchianò
mesh_terms: D001649:Bile Duct Diseases / Q000000981:diagnostic imaging* / Q000209:etiology*; D002758:Cholangiography; D005240:Feasibility Studies; D005260:Female; D006498:Hepatectomy / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed / Q000379:methods*