Preoperative Virtual Modeling of Liver Based on Computerized Tomography Data

Abstract

Aim. To explore the possibilities of “Avtoplan” computerized system for virtual modeling in preoperative planning and to evaluate its effectiveness in liver surgery.
Material and Methods. The survey of 50 patients with liver disease was analyzed. All patients underwent virtual modeling. The data were loaded into “Avtoplan” system. 3D models were created by radiologist with involvement of surgeon. At the planning stage the surgeon performed a virtual resection line and learned some anatomical features.
Results. Virtual modeling revealed following diseases: liver cyst and hemangioma (20 cases); hydatid liver cysts (7 cases); liver abscess (6 cases); hepatocellular carcinoma (5 cases); liver metastases (8 cases); portal thrombosis (4 cases). The operation was carried out in 31 patients. During surgery 3D-model was shown on the screen for interactive comparison with intraoperative situation. The use of virtual simulation allows the surgeon to confidently identify anatomical
structures and pathological changes, to form an optimum resection line, as well as to avoid damage of vascular trunks.
Conclusion. The developed algorithms of "Avtoplan" virtual simulation system provide the construction and analysis of the 3D-model of the abdominal cavity. Preoperative planning using virtual 3D-model confirmed effective evaluation of patient's anatomical features and necessary postoperative liver volume.