title: [Segmental anatomy of the liver in computed tomography: do we localize the lesion accurately?].
abstract: OBJECTIVE
  To evaluate if Couinaud's model using the planes of the major veins is an adequate tool for the presurgical localization of focal liver lesions.
  
  
  METHODS
  Biphasic helical CT scans were performed on patients evaluated for liver resection using an increased IV bolus of contrast medium (180 ml lopamidol) and 2 mm image reconstruction increments. During the first evaluation, all liver lesions were localized in the conventional way using the planes of the 3 major hepatic veins and the portal trunks as segmental boundaries. In a second review, all lesions were attributed to the nearest peripheral portal branches. The path and the segmental attribution of the portal branches were analysed. Evaluations were performed using an interactive cine mode as well as three-dimensional reconstructions.
  
  
  RESULTS
  20 of 126 (16%) liver lesions had a different segmental location if the individual anatomy of the peripheral portal branch was used instead of the conventional technique. These different locations were due to the path of the portal trunks or the path of the peripheral portal branches crossing the planes of the major hepatic veins.
  
  
  CONCLUSIONS
  The segmental anatomy of the liver using the planes of hepatic veins and portal trunks according to Couinaud is not an accurate tool for the presurgical localization of liver lesions in many cases.
authors.affiliation: Klinik für Radiologie, Johannes-Gutenberg-Universität Mainz. rieker@radiologie.klinik.uni-mainz.de
authors.forename: O
authors.initials: O
authors.lastname: Rieker
authors.forename: P
authors.initials: P
authors.lastname: Mildenberger
authors.forename: C
authors.initials: C
authors.lastname: Hintze
authors.forename: K
authors.initials: K
authors.lastname: Schunk
authors.forename: G
authors.initials: G
authors.lastname: Otto
authors.forename: M
authors.initials: M
authors.lastname: Thelen
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000000981:diagnostic imaging*; D003287:Contrast Media; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007483:Iothalamic Acid; D008099:Liver / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D008102:Liver Circulation; D008103:Liver Cirrhosis / Q000000981:diagnostic imaging*; D008113:Liver Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary; D011169:Portal Vein / Q000000981:diagnostic imaging; D015203:Reproducibility of Results; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media; D007483:Iothalamic Acid