title: Usefulness of three-dimensional CT cholangiography for patients prior to laparoscopic cholecystectomy.
abstract: OBJECTIVE
  The aim of this study was to demonstrate three-dimensional biliary anatomy by using spiral CT scanning for patients prior to laparoscopic cholecystectomy.
  
  
  METHODS
  We studied 22 patients (11 men, 11 women; mean age, 60 years) with preoperative imaging. All patients had normal serum bilirubin levels. Either 50 ml (in 10 cases) or 100 ml (in 12 cases) of meglumine iotroxate was infused intravenously over 30 minutes. Spiral CT scanning was started immediately after the infusion was finished. Volumetric data through the entire biliary tracts were obtained during one breath-hold. The data were reconstructed by using a maximum intensity projection algorithm and three-dimensional shaded surface rendering.
  
  
  RESULTS
  In all patients, the anatomical relationship between the cystic duct and the common bile duct was clearly depicted, including one with junctional anomaly. The intrahepatic biliary ducts and the confluence of the hepatic ducts were displayed from all angles. The third or higher intrahepatic branches were delineated in 11 of the 12 (92%) patients with the use of 100 ml of the cholangiographic agent and in seven of the 10 (70%) with 50 ml.
  
  
  CONCLUSIONS
  Three-dimensional CT cholangiography was able to provide adequate information about precise biliary anatomy.
authors.affiliation: Department of Radiology, Kyoto City Hospital, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Toyoda
authors.forename: K
authors.initials: K
authors.lastname: Hayakawa
authors.forename: M
authors.initials: M
authors.lastname: Kikkawa
authors.forename: H
authors.initials: H
authors.lastname: Fukushima
authors.forename: M
authors.initials: M
authors.lastname: Kataoka
authors.forename: S
authors.initials: S
authors.lastname: Mukaihara
authors.forename: K
authors.initials: K
authors.lastname: Nishimura
authors.forename: S
authors.initials: S
authors.lastname: Kawakami
mesh_terms: D000368:Aged; D001653:Bile Ducts, Intrahepatic / Q000000981:diagnostic imaging; D002758:Cholangiography; D017081:Cholecystectomy, Laparoscopic; D003287:Contrast Media; D003549:Cystic Duct / Q000000981:diagnostic imaging; D005260:Female; D006500:Hepatic Duct, Common / Q000000981:diagnostic imaging; D006801:Humans; D021621:Imaging, Three-Dimensional; D007458:Iodipamide / Q000031:analogs & derivatives*; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media; C012386:meglumine iotroxinate; D007458:Iodipamide