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Title

STUDY AND SIMULATION OF LITT IN BIOLOGICAL TISSUE WITH DUAL RECIPROCITY BOUNDARY ELEMENT METHOD

Pages

 Start Page 15 | End Page 24

Abstract

 Background: Laser Interstitial Thermo Therapy (LITT) is a minimally invasive surgical method to treat tumors in liver. Modeling laser effects on tissue in LITT has many advantages over other heat monitoring methods such as studying light and heat transfer in tissue, changing the effective parameters of the laser and lower cost. Among different numerical methods, DUAL RECIPROCITY BOUNDARY ELEMENT METHOD (DRBEM) is the newest method used by researchers to solve problems of heat transfer in tissue.Material and Methods: In this study the temperature increase in liver tissue is analyzed with DRBEM. MONTE CARLO METHOD with variable step size and implicit capture technique is used for light transport in tissue. The result of the DRBEM is also compared with Finite Element Method (FEM) results.Results: The results showed that both methods converge to similar results and the differences in temperatures are less than 1oC. Due to one dimension decrease of the problem in DRBEM, the solving time increases comparing with other numerical methods like FEM.Conclusion: DRBEM is an accurate and fast method to study heat transfer in biological tissue in LASER-TISSUE INTERACTION.

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