Optimization of the design of the microcoaxial antenna in multilayer breast phantom for the breast cancer treatment

摘要

This paper presents the design and the optimization of interstitial microcoaxial applicator antenna for microwave ablation treatment (MWA) of breast cancer. MWA is proposed as a treatment for breast cancer in initial or intermediate stages and involves the application of an electromagnetic field that generates a temperature increase in the cancerous tissue. A model and the validation of microwave radiation into the surrounding breast tissues are also presented in this paper; those patterns are obtained by applying ablation therapy. An optimization process was carried out by parametric sweeps of the antenna already designed, with the purpose of improving its efficiency and reducing the SWR when the antenna is inserted into the tissue. The model was simulated by using the Finite Element Method (FEM). The breast simulation is formed by three different tissues (fat, glandular and tumor tissues). The tissues of the breast should be considered in the study to observe the change of patterns of the Specific Absorption Rate (SAR). In the experimental validation, a quantitative comparison is made, both heating zones were measured giving as a result the similarity of the ablation area, the area of damaged caused by the ablation is 30 × 32 mm in the simulation and in experimentation is 35 × 45 mm.