title: Minimally invasive laparoscopic liver resection: 3D MDCT simulation for preoperative planning.
abstract: OBJECTIVE
  Laparoscopic liver resection has not gained wide acceptance compared with other laparoscopic procedures. We evaluated the impact of simulated surgery using data from multidetector CT scanning on planning for laparoscopic hepatectomy.
  
  
  METHODS
  The hepatectomy simulation system was programmed to perform three-dimensional reconstruction of the vasculature and to calculate the liver resection volume and surgical margin. In 35 patients undergoing laparoscopic hepatectomy or laparoscopy-assisted hepatectomy, the liver resection volume and margin were estimated by simulation preoperatively. Then, the estimated values were compared with the actual resected liver weight and margin.
  
  
  RESULTS
  Three-dimensional reconstruction allowed stereoscopic identification of the tumor-bearing portal vein and draining vein. The predicted liver resection volume and margin both showed a significant correlation with the actual values: the mean difference was 21 mL (P < 0.0001) and 1.3 mm (P < 0.01), respectively. Preoperative planning based on simulated resection facilitated laparoscopic mobilization of the liver and mini-laparotomy resection of a large tumor located in the upper right lobe.
  
  
  CONCLUSIONS
  Three-dimensional simulation of hepatectomy facilitated intraoperative identification of the vascular anatomy, and accurately predicted the resected liver volume and surgical margin. This simulation method should contribute to preoperative planning for safe and curative laparoscopic hepatectomy.
authors.affiliation: Department of Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan.
authors.forename: Junichi
authors.initials: J
authors.lastname: Yamanaka
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Okada
authors.forename: Shinichi
authors.initials: S
authors.lastname: Saito
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Kondo
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Yoshida
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Suzumura
authors.forename: Tadamichi
authors.initials: T
authors.lastname: Hirano
authors.forename: Yuji
authors.initials: Y
authors.lastname: Iimuro
authors.forename: Jiro
authors.initials: J
authors.lastname: Fujimoto
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000098:blood supply / Q000000981:diagnostic imaging* / Q000601:surgery*; D005260:Female; D006498:Hepatectomy / Q000379:methods*; D006801:Humans; D010535:Laparoscopy / Q000379:methods*; D008099:Liver / Q000000981:diagnostic imaging* / Q000601:surgery; D008113:Liver Neoplasms / Q000098:blood supply / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008488:Medical Illustration; D008875:Middle Aged; D011300:Preoperative Care; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods