多缝隙同轴式微波天线用于肝脏肿瘤消融。
A multi-slot coaxial microwave antenna for liver tumor ablation.
机构信息
Centers for Biomedical Engineering, Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, People's Republic of China. These authors contributed equally to this work and should be considered co-first authors.
出版信息
Phys Med Biol. 2018 Sep 6;63(17):175011. doi: 10.1088/1361-6560/aad9c5.
This paper presents a multi-slot coaxial antenna with a pi impedance matching network for liver tumor ablation. A multi-slot radiating probe was optimized by using the modified genetic algorithm to produce a near-spherical heating zone with significantly increased possibility of conformal treatment. A pi impedance matching network was designed to match the feeding transmission line and antenna without increasing antenna size. The reflection coefficient, ablation zone shape, specific absorption rate, and temperature were determined by a finite element electromagnetic simulation using COMSOL. Experimental validations were designed to evaluate the proposed antenna. Both simulation and experimental results show that the proposed antenna has the ability for liver tumor ablation, which offers faster heating rates in the heating center and more localized heating distribution than the conventional single-slot antenna.
本文提出了一种用于肝肿瘤消融的多缝隙同轴天线，带有π阻抗匹配网络。通过使用改进的遗传算法对多缝隙辐射探头进行了优化，以产生具有显著增加适形治疗可能性的近球形加热区。设计了一个π阻抗匹配网络，以匹配馈电传输线和天线，而不增加天线尺寸。使用 COMSOL 的有限元电磁模拟确定了反射系数、消融区形状、比吸收率和温度。设计了实验验证来评估所提出的天线。仿真和实验结果均表明，所提出的天线具有肝肿瘤消融的能力，其在加热中心的加热速率更快，且加热分布比传统的单缝隙天线更具局部性。
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