COMPUTATION OF HYPERTHERMIA-SAR DISTRIBUTIONS IN 3-D

A formulation for the solution of the general Maxwell's equations to predict the electromagnetic power deposition in a three dimensional model of a human body irradiated by an annular array applicator is investigated in this paper. Methods for generating.the grid, as well as displaying the three dimensional solution are presented. A least square finite element approach to the problem is developed. Difficulties which arise as a result of the finite element trial functions are identified. As a result, it is difficult to impose the divergence and curl equations together. The boundary element formulation which relies on free space analytical solution, is shown to overcome this difficulty and is demonstrated in two dimensions. These methods form the basis of a treatment planning system under development which will have the capability of generating the finite element grid model of the body from computerized tomography scans, solve for the fields and display the absorbed power distributions. © 1990, IEEE. All rights reserved.