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适用于超声成像的旁瓣相消算法

Sidelobe Canceller Algorithm for Ultrasonic Imaging

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摘要

为提高超声回波图像的横向分辨率、对比度,抑制最大旁瓣能量,提出一种适用于超声成像的旁瓣相消算法。利用基于特征空间的广义消旁瓣算法获得权值矢量,通过超声回波信号的相干系数优化权值矢量,对常见的点目标和暗斑进行成像。仿真结果表明,本文算法相较于延时叠加算法在横向分辨率上提高了60%,相较于特征空间算法在对比度上改善了112%。基于实际超声系统的实验结果与仿真结果一致,证明了本文算法的有效性。

Abstract

To improve the lateral resolution and contrast and restrain the peak sidelobe energy of ultrasonic echo images, a sidelobe canceller algorithm applied to the ultrasonic imaging is proposed. The proposed method calculates the weight vector by eigenspace-based generalized sidelobe canceller algorithm. The coherence factor of the ultrasonic echo signal is used to optimize the obtained weight vector. Then, the common point target and dark speck are imaged. The simulation results show that the proposed method improves the lateral resolution by 60% compared with delay-and-sum algorithm, and has a improvement of 112% in contrast compared with the eigenspace algorithm. Experimental results based on an actual ultrasonic system agree well with the simulated results, which proves the effectiveness of the proposed method.

Newport宣传-MKS新实验室计划
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中图分类号:R197.39

DOI:10.3788/lop56.071103

所属栏目:成像系统

基金项目:“十三五”科技支撑计划(2017YFC0109700)、天津市自然科学基金(15JQNJC14200)

收稿日期:2018-09-03

修改稿日期:2018-10-08

网络出版日期:2018-10-30

作者单位    点击查看

李嘉科:北京机械设备研究所, 北京 100854
陈晓冬:天津大学精密仪器与光电子工程学院, 天津 300072光电信息技术教育部重点实验室(天津大学), 天津 300072
汪毅:天津大学精密仪器与光电子工程学院, 天津 300072光电信息技术教育部重点实验室(天津大学), 天津 300072
郁道银:天津大学精密仪器与光电子工程学院, 天津 300072光电信息技术教育部重点实验室(天津大学), 天津 300072

联系人作者:李嘉科(lijiake1223@tju.edu.cn)

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引用该论文

Li Jiake,Chen Xiaodong,Wang Yi,Yu Daoyin. Sidelobe Canceller Algorithm for Ultrasonic Imaging[J]. Laser & Optoelectronics Progress, 2019, 56(7): 071103

李嘉科,陈晓冬,汪毅,郁道银. 适用于超声成像的旁瓣相消算法[J]. 激光与光电子学进展, 2019, 56(7): 071103

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