Abstract
Heat transfer in tissues during electromagnetic heating obtained by a 432 MHz directional antenna for therapeutic purposes is considered. The two-dimensional transient heat conduction equation, which takes into account the electromagnetic heating and the cooling owing to blood circulation is solved by finite-difference means. Solutions in cases of inhomogeneous tissues and of tissues containing large blood vessels are given. Also, the analytical solution of the corresponding one-dimensional steady-state problem in the principal axis of the electromagnetic field is derived. This solution is in good agreement with the two-dimensional numerical solution and may therefore be employed for making quick calculations.
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