用于微波肿瘤消融的三轴天线的分析与实验验证
Analysis and experimental validation of a triaxial antenna for microwave tumor ablation.
作者信息
Brace Christopher L, van der Weide Daniel W, Lee Fred T, Laeseke Paul F, Sampson Lisa
机构信息
Department of Electrical and Computer Engineering, University of Wisconsin - Madison.
出版信息
IEEE MTTS Int Microw Symp. 2004 Jun;3(6-11):1437-1440. doi: 10.1109/MWSYM.2004.1338842.
Abstract
We apply a new triaxial antenna for microwave ablation procedures. The antenna consists of a coaxial monopole inserted through an 18-gauge biopsy needle positioned one quarter-wavelength from the antenna base. The biopsy needle creates a triaxial structure, which enhances return loss by more than 10 dB, thus limiting return currents along the feed line. Numerical simulations are used to optimize the antenna design. Numerical and ex-vivo experimental results are presented to quantify the field distribution, heating pattern and return loss of the antenna.
摘要
我们将一种新型三轴天线应用于微波消融手术。该天线由一个同轴单极子组成，该单极子穿过一根18号活检针插入，活检针距天线底部四分之一波长。活检针形成了一个三轴结构，可将回波损耗提高超过10 dB，从而限制沿馈线的回流电流。数值模拟用于优化天线设计。给出了数值和离体实验结果，以量化天线的场分布、加热模式和回波损耗。
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