Three Dimentional Analysis in Laser Puncture Therapy for Liver Cancer

Abstract

Surgical lasers provide a means for producing precise ablation of tissue associated with decreased mechanical trauma of surrounding tissue. as well as improved hemostasis, hence generally accepted as an advantageous tool in surgery. Spherical laser coagulation therapy, which makes a round coagulation inside the liver with a spherical radiation of Nd-YAG Laser fiber tip, is effective for the treatment of the liver cancer.
Preoperative simulation of the laser fiber insertion is important to avoid damaging important vessels in this therapy. Simulation of the needle puncture for the tumors in the liver were carried out with Computer Aided Surgery (CAS) system, which reconstruct the three-dimensional diagnostic model, from the set of sliced images, e. g. a x-ray computerized tomography and/or a magnetic resonance imaging. With this reconstructed model, the safety areas of needle punctuation was indicated in the open surgery, the PTLV (Percutaneous Transhepatic Laser Vaporization) and the Laparoscopic spherical laser coagulation.