技术说明：紧凑型热声成像系统手持偶极天线的设计。
Technical Note: Design of a handheld dipole antenna for a compact thermoacoustic imaging system.
机构信息
School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, 611731, China.
Center for Information in Medicine, University of Electronic Science and Technology of China, Chengdu, 611731, China.
出版信息
Med Phys. 2019 Feb;46(2):851-856. doi: 10.1002/mp.13294. Epub 2018 Dec 6.
PURPOSE
Conventional antenna used in thermoacoustic imaging (TAI) is often bulky, making it difficult to translate TAI from the bench to the clinic. In this paper, we proposed a handheld dipole antenna which will be a good candidate for the construction of a compact TAI system.
METHODS
Here, we propose a TAI system based on a handheld dipole antenna with an aperture of 6 cm and a weight of 230 g. Compensation of the electric field attenuation for such a system was also investigated.
RESULTS
Compared to the conventional open-ended waveguide and pyramidal horn antenna used in TAI, our results reveal that the electric field attenuation induced distortion is effectively reduced by using the attenuation factor 1/r for compensation and that the handheld dipole antenna provides the highest efficiency of microwave delivery.
CONCLUSIONS
This study suggests that the handheld dipole antenna has the potential to be utilized for the construction of a compact TAI system, making TAI more suitable for preclinical and clinical applications.
目的
热声成像（TAI）中常用的传统天线通常体积庞大，难以将 TAI 从实验室转化到临床应用。在本文中，我们提出了一种手持式偶极天线，它将是构建紧凑 TAI 系统的理想候选方案。
方法
在这里，我们提出了一种基于手持式偶极天线的 TAI 系统，该系统的孔径为 6 厘米，重量为 230 克。我们还研究了对此类系统的电场衰减进行补偿的方法。
结果
与 TAI 中常用的开放式波导和角锥形喇叭天线相比，我们的结果表明，通过使用衰减因子 1/r 进行补偿，可以有效地减少电场衰减引起的失真，并且手持式偶极天线提供了最高的微波传输效率。
结论
本研究表明，手持式偶极天线有可能用于构建紧凑的 TAI 系统，使 TAI 更适合于临床前和临床应用。
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