Effect of the antenna slot numbers and position on the performance of microwave ablation

Q3 Medicine

Medicine in Novel Technology and Devices Pub Date : 2023-10-31 DOI:10.1016/j.medntd.2023.100271

Sabiha Binte Aziz , Md Rejvi Kaysir , Md Jahirul Islam , Torikul Islam , Mahmudur Rahman

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Abstract

Microwave ablation (MWA) is a type of thermal ablation used for cancer treatment in interventional radiology. To induce localized tissue heating MWA employs electromagnetic waves within the microwave energy spectrum, which is done by the precisely designed antenna. This study substantially emphasizes the design and performance ameliorating of slot (both single and double) antennae and compares the results with conventional monopole antennae in terms of temperature distribution, specific absorption ratio (SAR), and thermal tissue damage rate. The simulation has been done in COMSOL by solving the Bioheat equation along with Maxwell electromagnetic equations using the finite element method. The simulation results reveal that the double-slot antenna has the most accurate and directional heat dissipation for liver tumors as well as the highest tissue damage rate and SAR. The highest SAR was found to be 3500 W/kg and 3350 W/kg at the implant depth of 61 mm and 63 mm for double and single-slot antennae, respectively. In addition, the fastest tissue damage occurred near the upper slot of the double-slot antenna. This study helps to understand the basic design parameters for enhancing single and double-slot antennae performance.

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天线槽数和位置对微波消融性能的影响

微波消融(MWA)是介入放射学中用于癌症治疗的一种热消融。MWA利用微波能谱内的电磁波来诱导局部组织加热，这是通过精确设计的天线来实现的。本研究着重于槽天线(包括单极和双极)的设计和性能改进，并在温度分布、比吸收比(SAR)和热组织损伤率方面与传统单极天线进行了比较。在COMSOL软件中，采用有限元法求解生物热方程和麦克斯韦电磁方程，进行了数值模拟。仿真结果表明，双槽天线对肝脏肿瘤具有最准确、最定向的散热效果，同时具有最高的组织损伤率和SAR，在植入深度为61 mm和63 mm时，双槽和单槽天线的最高SAR分别为3500 W/kg和3350 W/kg。此外，双槽天线上槽附近的组织损伤速度最快。本研究有助于了解提高单槽和双槽天线性能的基本设计参数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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