一种用于超声成像的零相位滤波后处理方法

详细信息    查看全文 | 推荐本文 |

英文篇名：A zero-phase filtering post-processing method for ultrasonic imaging 作者：韩晓丽 ; 吴文焘 ; 曹政 英文作者：HAN Xiaoli;WU Wentao;CAO Zheng;Institute of Acoustics, Chinese Academy of Sciences; 关键词：超声成像 ; 超声相控阵 ; 零相位滤波 ; 无限冲激响应滤波器 ; 效率 英文关键词：Ultrasonic imaging;;Ultrasonic phased array;;Zero-phase filtering;;Infinite impulse response filter;;Efficiency 中文刊名：应用声学 英文刊名：Journal of Applied Acoustics 机构：中国科学院声学研究所; 出版日期：2019-03-12 15:30 出版单位：应用声学 年：2019 期：02 基金：国家自然科学基金项目(61601454);; 中国科学院声学研究所青年英才基金项目(QNYC201732);中国科学院声学研究所青年英才基金项目(QNYC201617) 语种：中文; 页：13-19 页数：7 CN：11-2121/O4 ISSN：1000-310X 分类号：TN713;TP391.41

摘要

针对超声成像中基于有限脉冲响应滤波器的零相位滤波处理效率低难以满足实时性要求高的系统需求的问题,提出采用无限冲激响应滤波器实现零相位滤波后处理的方法。首先,分别设计幅频特性相似的有限脉冲响应滤波器和无限冲激响应滤波器作为零相位滤波器的基础滤波器;然后,针对超声相控阵系统采集的超声波回波射频信号,采用两种不同的零相位滤波方法进行处理,对比分析二者的性能、成像效果和效率。结果表明,实现幅频特性近似的零相位滤波,无限冲激响应滤波器具有更低的阶数,可以达到前者的1/4,算法的运算量更低,仅约为前者的1/2。当无限冲激响应滤波器采用直接形式实现时,效率更高,系统的实时性更好。
        Zero-phase filtering processing based on finite impulse response(FIR) filter is inefficient and is difficult to meet the high real-time demand in ultrasonic system. We use infinite impulse response filter(IIR)based zero-phase filtering as an alternative. First of all, the FIR and IIR filter with similar amplitude-frequency response characterized by the same parameters are designed respectively. Then, analysis of the performance,imaging effectiveness and efficiency of both zero-phase filtering methods is made after the two different kinds of zero-phase filtering methods are applied to ultrasonic RF echoes collected by ultrasonic phased array system.The results show that zero-phase filtering based on IIR is less computationally intensive than that of FIR-based case even when amplitude-frequency characteristics of these two cases are almost the same. More specifically,the ratio of filter orders is about 1/4 and the ratio of the amount of computation is about 1/2. When IIR filter is realized in direct form(I), IIR based zero-phase filtering is more efficient, and can better meet the requirements of real-time ultrasonic system.

引文

[1]赵大丹.超声相控阵成像关键算法研究[D].南京:南京航空航天大学, 2015.
    [2] Xiao K, Wang Q, Hu D. Post signal processing of ultrasonic phased array inspection data for non-destructive testing[J]. Procedia Engineering, 2012, 43(7):419–424.
    [3] He A, Ustuner K. Noise estimation method and apparatus for noise adaptive ultrasonic image processing, US:6704437[P]. 2004-03-09.
    [4] Abdessalem B, Redouane D. Ultrasonic?aw detection in composite materials using SSP-MPSD algorithm[J]. Journal of Electrical Engineering&Technology, 2014, 9(5):1753–1761.
    [5] Oruklu E, Vallina F M, Saniie J. E?cient hardware realization of frequency-diverse ultrasonic?aw detection using zero-phase IIR?lters[C]. IEEE Ultrasonics Symposium,2005.
    [6]王世一.数字信号处理[M].修订版.北京:北京理工大学出版社, 2006.
    [7]张红梅,韩万刚. FIR滤波器时延分析及其在信号融合中的应用[J].武汉大学学报:工学版, 2016, 49(2):303–308.Zhang Hongmei, Han Wangang. Time-delay analysis of FIR?lter and its application to signal fusion[J]. Engineering Journal of Wuhan University, 2016, 49(2):303–308.
    [8] Ling Z, Liu F, Kong S, et al. Application of zero-phase digital?lter in ultrasonic pressure measurement[C]. International Conference on Electric Information and Control Engineering, 2011.
    [9]纪跃波,秦树人,汤宝平.零相位数字滤波器[J].重庆大学学报:自然科学版, 2000, 23(6):4–7.Ji Yuebo, Qin Shuren, Tang Baoping. Digital?ltering with zero phase error[J]. Journal of Chongqing University:Natural Science Edition, 2000, 23(6):4–7.
    [10] Oruklu E, Saniie J. Hardware-e?cient realization of a realtime ultrasonic target detection system using IIR?lters[J].IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2009, 56(6):1262–1269.
    [11]陈怀琛.数字信号处理教程:MATLAB释义与实现[M].北京:电子工业出版社, 2013.
    [12]吴文焘,吕燚.超声成像中的级联积分梳状滤波器正交解调算法[C].中国声学学会青年学术会议, 2011.
    [13] Oppenheim A V, Schafer R W, Buck J R. Discrete-time signal processing[M]. 2nd Edition. New Jersey:PrenticeHall, Inc., 1999.