深部癌加温用大型方形導波管アプリケータの数値解析

抄録

A two-dimensional numerical method for calculating electric field and specific absorption rate (SAR) distributions in a human body cross-section produced by a large waveguide applicator is developed using Fast-Fourier-Transform algorithm and conjugate gradient method. Severial examples of SAR distributions in a muscle-like cylinder model and a realistic model of a human body cross-section calculated by the method are given. Results of the numerical analysis show the possibility of deep tumor heating by the use of the large waveguide applicator. Large amount of energy is deposited in high-conductivity regions like kidney, muscle, and liver without excessive deposition in fat and bone.