电子学报 ›› 2018, Vol. 46 ›› Issue (1): 31-38.DOI: 10.3969/j.issn.0372-2112.2018.01.005

• 学术论文 • 上一篇    下一篇

符号相干系数加权的超声平面波复合成像算法

郑驰超1, 彭虎1, 赵巍1,2   

  1. 1. 合肥工业大学生物医学工程系, 安徽合肥 230009;
    2. 皖南医学院弋矶山医院, 安徽芜湖 241001
  • 收稿日期:2016-05-04 修回日期:2016-10-27 出版日期:2018-01-25
    • 通讯作者:
    • 彭虎
    • 作者简介:
    • 郑驰超,男,1984年12月生,安徽人.副研究员、硕士生导师.2010年毕业于中国科学技术大学电子科学与技术系,现工作于合肥工业大学生物医学工程系.主要从事医学超声工程、信号处理等方向的研究.E-mail:cczheng@hfut.edu.cn
    • 基金资助:
    • 国家自然科学基金青年科学基金 (No.61201060); 国家自然科学基金 (No.61172037)

Ultrasound Imaging Based on Coherent Plane Wave Compounding Weighted by Sign Coherence Factor

ZHENG Chi-chao1, PENG Hu1, ZHAO Wei1,2   

  1. 1. Department of Biomedical Engineering, Hefei University of Technology, Hefei, Anhui 230009, China;
    2. The First Affiliated Hospital of Wannan Medical College, Wuhu, Anhui 241001, China
  • Received:2016-05-04 Revised:2016-10-27 Online:2018-01-25 Published:2018-01-25
    • Supported by:
    • Youth Fund of National Natural Science Foundation of China (No.61201060); National Natural Science Foundation of China (No.61172037)

摘要: 平面波超声成像算法运用广泛,具有较高的成像帧率,但成像质量较差.相干平面波复合成像(CPWC)算法采用对多个方向平面波成像输出直接叠加的方式进行成像,有效的提高了成像质量,但忽略了平面波之间的相干性.本文提出符号相干系数加权的平面波复合成像算法(SCF-CPWC).该算法将不同角度的平面波对同一个成像点的成像结果做为向量,计算出该向量的符号相干系数(SCF),对该成像点的相干平面波复合成像的输出结果进行加权成像,得到SCF-CPWC算法的最终结果.仿真和实验结果表明SCF-CPWC算法具有更好成像质量.相对于传统的CPWC成像算法,可以明显改善成像的横向分辨率和暗斑对比度.

关键词: 超声成像, 相干平面波复合成像, 符号相干系数

Abstract: Plane wave imaging has been widely used in many applications. It has high frame rate but relatively poor image quality. Coherent plane wave compounding (CPWC)is an imaging method of summing beamformed outputs of array elements from different plane wave firing events, which can significantly improve the quality. However, the coherence between the plane waves is out of consideration. In this paper, we proposed a novel method in which CPWC is weighted by the sign coherence factor (SCF-CPWC). Firstly, a vector is composed by the beamformed outputs of the multiple steered plane wave firings on the same image point. Secondly, the sign coherence factor (SCF)of the vector is calculated, and then employed to weight the corresponding output of CPWC to get the final imaging result. Both simulation and experimental results demonstrate that the proposed SCF-CPWC method has achieved a better performance than CPWC. Compared to CPWC, it can not only improve the lateral resolution, but also increase the anechoic cyst contrast.

Key words: ultrasonic imaging, coherent plane wave compounding, sign coherence factor

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