Time-Domain Wideband Adaptive Beamforming for Radar Breast Imaging
Time-Domain Wideband Adaptive Beamforming for Radar Breast Imaging
复制标题
DOI：
10.1109/tap.2015.2398125
复制
发表时间：
2015-04-01
影响因子：
5.7
通讯作者：
Craddock, Ian J.
中科院分区：
文献类型：
--
作者：
Byrne, Dallan;Craddock, Ian J.
提出了一种新的宽带微波雷达成像方法，用于检测乳房内显著介电对比度区域。杂波减少对任何雷达成像算法来说都是至关重要的，特别是对于乳腺组织组成不均匀的临床患者数据。时域数据自适应成像方法已经在窄带微波雷达乳房成像中应用，当接收到的信号频谱内容为宽带时。在本研究中，提出了一种宽带时域自适应成像方法来实现跨频谱的数据自适应聚焦，以减少杂波。均衡滤波器适用于使用乳房的平均介电特性的计算估计来补偿通过组织的传播畸变。利用数值、实验和临床数据，结合延迟和（DAS）方法评估了所提出的宽带自适应成像方法的有效性。与DAS技术相比，目标散射体被清晰地检测到，而杂波水平显著降低，在4到6 dB之间。
A novel wideband microwave radar imaging method is presented to detect regions of significant dielectric contrast within the breast. Clutter reduction is paramount to any radar imaging algorithm, especially with clinical patient data where the tissue composition of the breast is inhomogeneous. Time-domain data-adaptive imaging methods have been previously applied in a narrowband manner for microwave radar breast imaging when the received signal spectral content was wideband. In this study, a wideband time-domain adaptive imaging approach is presented to perform data-adaptive focusing across the spectrum to reduce clutter. An equalization filter is adapted to compensate for the propagation distortion through tissue using a calculated estimate of the average dielectric properties of the breast. The effectiveness of the proposed wideband adaptive imaging approach is evaluated in conjunction with the delay-and-sum (DAS) method using numerical, experimental, and clinical data. Target scatterers are clearly detected while clutter levels are reduced significantly, between 4 and 6 dB, when compared to the DAS technique.