Metamaterial Applicator for Hyperthermia Cancer Treatment Procedure:Overview Study

摘要

This paper presents an overview of metamaterial slabs or lens as an integrated structure for applicators used in hyperthermia cancer treatment procedure.Hyperthermia treatment procedure(HTP)is a new technique that exposes a cancerous tissue by increasing tissue temperature until 41 °C to 45 °C at a certain period with electromagnetic radiation.Based on the previous study,by moving the microwave sources relative to the metamaterial(MTM)lenses from a tumor/cancer phantom alters the concentration of heating within biological tissue.In this paper,the overview of a metamaterial study on HTP from 2009 to 2019 was carried out.This study indicated that the left-handed metamaterial(LHM)lens was observed to be able to improve the focusing capabilities of HTP on the treated tissue.However,a further study is significantly required to provide different focus position distances on the treated tissue for different stages of cancer.Therefore,a modified HTP applicator integration with an MTM lens structure was proposed.It is aimed to improve focus position distance on the treated tissue and to reduce unwanted hot-spots on surrounding healthy tissues simultaneously.The proposed modified structure was presented in this paper.Specific absorption rate(SAR)simulation was carried out with SEMCAD X 14.8.4 to obtain a SAR distribution for determining penetration depth and focusing position distance on the treated tissue.