De Santis Valerio, Sill Jeff M, Bourqui Jeremie, Fear Elise C
Department of Electrical and Computer Engineering, University of L'Aquila, Italy.
Bioelectromagnetics. 2012 Apr;33(3):215-25. doi: 10.1002/bem.20694. Epub 2011 Aug 8.
This article deals with the safety assessment of several ultra-wideband (UWB) antenna designs for use in prototype microwave breast imaging systems. First, the performances of the antennas are validated by comparison of measured and simulated data collected for a simple test case. An efficient approach to estimating the specific energy absorption (SA) is introduced and validated. Next, SA produced by the UWB antennas inside more realistic breast models is computed. In particular, the power levels and pulse repetition periods adopted for the SA evaluation follow the measurement protocol employed by a tissue sensing adaptive radar (TSAR) prototype system. Results indicate that the SA for the antennas examined is below limits prescribed in standards for exposure of the general population; however, the difficulties inherent in applying such standards to UWB exposures are discussed. The results also suggest that effective tools for the rapid evaluation of new sensors have been developed.
本文探讨了几种用于原型微波乳腺成像系统的超宽带（UWB）天线设计的安全性评估。首先，通过比较针对一个简单测试案例收集的测量数据和模拟数据，验证了天线的性能。引入并验证了一种估计比吸收率（SA）的有效方法。接下来，计算了超宽带天线在更逼真的乳腺模型内部产生的比吸收率。特别是，用于比吸收率评估的功率水平和脉冲重复周期遵循组织传感自适应雷达（TSAR）原型系统采用的测量协议。结果表明，所检查天线的比吸收率低于一般人群暴露标准规定的限值；然而，讨论了将此类标准应用于超宽带暴露所固有的困难。结果还表明，已经开发出了用于快速评估新型传感器的有效工具。
