Numerical study of microwave cancer therapy for liver tissue using bioheat model

Abstract

A numerical study of microwave cancer therapy for liver tissue with an elliptic tumor cell has been carried out by this thesis. The electromagnetic wave frequency and the bio-heat transfer equations have been used for numerical simulation. Using Galerkin’s weighted residual technique the time dependent governing equations with appropriate boundary conditions have been solved. The effects of different microwave power (from 5 to 25 W), frequency (from 0.7 to 5 GHz) and time (from 1 to 1000 s) on tumor cell have been examined by this simulation and displayed graphically in terms of the microwave power dissipation, isothermal lines inside liver tissue, point graph of temperature at different locations, specific absorption rate (SAR) and surface average temperature of tumor cell. The results demonstrate that microwave power and frequency have significant impacts on the temperature distribution and SAR values of liver. When the microwave power as well as frequency is increased, the SAR value and the tissue temperature also increase but high temperature is harmful for healthy tissue. It is observed from the analysis that the required time may be 180 s to destroy the maximum domain of the considered size of tumor cell without damaging the surrounding normal tissue with a power of 10 W and a frequency of 2.45 GHz.