文章：

利用时移测量法测定离体牛肝消融区

Determining of Ablation Zone in Ex Vivo Bovine Liver Using Time-Shift Measurements

原文发布日期：31 October 2023

DOI: 10.3390/cancers15215230

类型: Article

开放获取: 是

英文摘要：

This study presents a measurement principle for determining the size of the ablation zone in MWA, which could ultimately form an alternative to more expensive monitoring approaches like CT. The measurement method is based on a microwave transmission measurement. A MWA is performed experimentally on ex vivo bovine liver to determine the ablation zone. This setup uses a custom slot applicator performing the MWA at an operating frequency of 2.45 GHz and a custom bowtie antenna measuring the waves transmitted from the applicator. Furthermore, a custom measurement probe is used to determine the dielectric properties. A time-shift analysis is used to determine the radial extent of the ablation zone. Several measurements are carried out with a power of 50 W for 10 min to show the reproducibility. The results show that this method can provide reproducible outcomes to determine the ablation zone with a maximum error of 4.11%.

摘要翻译： 

本研究提出了一种用于确定微波消融（MWA）中消融区尺寸的测量原理，该方法最终可替代成本较高的计算机断层扫描（CT）等监测手段。该测量方法基于微波传输测量技术。通过在离体牛肝上进行实验性微波消融以确定消融区域，实验采用工作频率为2.45 GHz的定制缝隙辐射器实施消融，同时使用定制蝶形天线测量从辐射器传输的微波。此外，通过定制测量探头测定介电特性，并采用时移分析法确定消融区的径向范围。为验证可重复性，研究以50 W功率进行10分钟的多组测量。结果表明，该方法能提供可重复的消融区测定结果，最大误差为4.11%。

原文链接：

Determining of Ablation Zone in Ex Vivo Bovine Liver Using Time-Shift Measurements