加入噪声的早期乳腺癌检测时域逆散射算法性能分析  

Anti-noise performance of fast time domain microwave inverse scattering algorithm for early breast cancer detection

作　　者：陈碧云[1] 张业荣[1] 陈功[1] 潘鑫[2] 

机构地区：[1]南京邮电大学电子与光学工程学院,江苏南京210023 [2]中国人民解放军空军航空大学,辽宁阜新123000

出　　处：《南京邮电大学学报（自然科学版）》2017年第6期23-28,共6页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61601245);中国博士后基金(2016M601693);东南大学毫米波国家重点实验室开放课题(K201724)资助项目

摘　　要：为了提高微波断层成像的效率,提出了一种基于ADI-FDTD方法的快速时域逆散射新算法。为进一步研究该算法的适用性,文中首次在测量场中加入噪声来检测算法的性能。针对乳腺癌检测这一热点问题,采用二维乳房模型进行了测试,分别采用了高斯分布噪声模型和均匀分布噪声模型来进行仿真模拟,实验结果显示该算法的抗噪声性能良好。To improve the detection efficiency, an alternating-direction implicit finite-difference time-domain （ADI-FDTD） based inverse scattering algorithm is proposed. The algorithm formulates a cost functional,according to least squares criterion, to turn the inverse problem into a constrained minimization problem. Based on the forward and backward time stepping imaging algorithm, the ADI-FDTD method is applied during the iterative calculation. Considering the existence of the noise during measurements, the anti-noise performances of the algorithm are firstly analyzed. The algorithm is evaluated for a two-dimensional （2D） semicircle breast model. The experimental results show that the ADI-FDTD based inverse scattering algorithm has characteristics of high accuracy and good anti-noise oerformance.

关 键 词：ADI-FDTD 乳腺癌 微波断层成像 抗噪声性能 

分 类 号：TN011[电子电信—物理电子学]