A coaxial-slot antenna for invasive microwave hyperthermia therapy

Abstract

When the technique of invasive microwave hyper-thermia is applied to cancer treating, the distribution of microwave thermal field and the effect of the therapy are determined by the type of microwave radiative antenna. The thermal field of biological tis-sue produced by microwave radiative antenna is in-vestigated in this paper. The distribution of thermal field and specific absorption rate (SAR) of invasive coaxial-slot antenna in the frequency of 2450 MHz are obtained by the technique of finite element analy-sis. According to the experiment of heating the ex vivo pork liver by this kind of antenna, the result concor-dant with the theory is obtained. Therefore, it is sug-gested that this research could be a reference for clinical therapy and operation scheme.