张路南,
王浩,
彭虎,
合肥工业大学生物医学工程系 ??合肥 ??230009
基金项目:国家自然科学基金(61201060, 61172037)
详细信息
作者简介:郑驰超：男，1984年生，副研究员，硕士生导师，研究方向为医学超声成像、信号处理
张路南：女，1994年生，硕士生，研究方向为医学信号处理
王浩：男，1994年生，硕士生，研究方向为电路与系统
彭虎：男，1962年生，教授，博士生导师，研究方向为医学超声工程、电路与系统
通讯作者:彭虎 hpeng@hfut.edu.cn
中图分类号:TN911.7; R445.1计量
文章访问数:934
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被引次数:0
出版历程
收稿日期:2018-01-29
修回日期:2018-06-06
网络出版日期:2018-08-30
刊出日期:2018-12-01
Plane-wave Compounding with Short-lag Coherence Factor Weighting
Chichao ZHENG,Lunan ZHANG,
Hao WANG,
Hu PENG,
Department of Biomedical Engineering, Hefei University of Technology, Hefei 230009, China
Funds:The National Natural Science Foundation of China (61201060, 61172037)
摘要
摘要:相干平面波复合(CPWC)成像算法采用多个角度平面波成像结果直接叠加的方式进行成像，具有速度快，质量高等优点，CPWC成像直接叠加的成像方式，忽略了平面波成像结果之间的相干性。相干系数(CF)加权算法可以有效提高成像的分辨率和对比度，降低了背景成像质量。该文提出了短阶相干系数(SLCF)加权算法，该算法采用角度差异参数来确定相干系数的阶数，根据角度差异较小的平面波输出计算相干系数，对CPWC成像结果进行加权成像。仿真和实验结果表明SLCF加权算法相对于传统的CPWC成像算法，可以改善成像的横向分辨率和对比度。相对CF和广义相干系数(GCF)算法，SLCF可以提高对比度和背景成像质量，而且运算量更低。
关键词:超声成像/
相干平面波复合成像/
短阶相干系数/
角度差异参数
Abstract:The Coherent Plane-Wave Compounding (CPWC) algorithm is based on the recombination of several plane-waves with different steering angles, which can achieve high-quality images with high frame rate. However, CPWC ignores the coherence between the plane-wave imaging results. Coherence Factor (CF) weighted algorithm can effectively improve the imaging contrast and resolution, while it degrades the background speckle quality. A Short-Lag Coherence Factor (SLCF) algorithm for CPWC is proposed. SLCF uses the angular difference parameter to ascertain the order of the coherence factor and calculates the coherence factor for the plane-waves with small angular difference. Then, SLCF is utilized to weight CPWC to obtain the final images. Simulated and experimental results show that SLCF-weighted algorithm can improve the imaging quality in terms of lateral resolution and Contrast Ratio (CR), compared with CPWC. In addition, in comparison with CF and Generalized Coherence Factor (GCF) weighted algorithm, SLCF can achieve better background speckle quality and it has lower computational complexity.
Key words:Ultrasound imaging/
Coherent Plane-Wave Compounding (CPWC)/
Short-Lag Coherence Factor (SLCF)/
Angle difference parameter
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