文章摘要
邱芳,唐雨嘉,崔崤峣,焦阳.联合空间与角度的符号相干系数平面波成像[J].声学技术,2023,42(2):184~191
联合空间与角度的符号相干系数平面波成像
Plane wave imaging by combining spatial and angular sign coherence coefficients
投稿时间:2021-11-01  修订日期:2022-01-04
DOI:10.16300/j.cnki.1000-3630.2023.02.009
中文关键词: 平面波成像  相干系数法  空间符号相干因子  角度符号相干因子
英文关键词: plane wave imaging  coherence coefficient method  spatial sign coherence factor  angular sign coherence factor
基金项目:
作者单位E-mail
邱芳 中国科学技术大学生物医学工程学院, 江苏苏州 215163
中国科学院苏州生物医学工程技术研究所, 江苏苏州 215163 
 
唐雨嘉 中国科学技术大学生物医学工程学院, 江苏苏州 215163
中国科学院苏州生物医学工程技术研究所, 江苏苏州 215163 
 
崔崤峣 中国科学院苏州生物医学工程技术研究所, 江苏苏州 215163  
焦阳 中国科学院苏州生物医学工程技术研究所, 江苏苏州 215163 jiaoy@sibet.ac.cn 
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中文摘要:
      超声平面波成像是近年来一种应用较广泛的超快速超声成像方法,多角度相干平面波复合(Coherent PlaneWave Compounding,CPWC)成像在不过多损失速率的情况下,提升成像质量。但普通的CPWC方法只是简单复合多个角度延时叠加(Delay and Sum,DAS)后的数据,并未考虑到单个角度内以及多个角度之间数据的相关性。文章提出了一种联合空间与角度的符号相干系数(Angular Spatial Sign Coherence Factor,asSCF)平面波成像方法,将空间符号相干因子和角度符号相干因子创新性地融合到波束合成的过程中,充分考虑信号之间的相关性,旨在提升多角度复合成像质量。进行了仿真实验、仿体实验以及在体组织实验,对asSCF-CPWC方法、单一的符号相干系数法以及传统CPWC方法成像进行对比,结果发现asSCF-CPWC方法具有更好的横向分辨能力和成像对比度。
英文摘要:
      Ultrasonic plane wave imaging is a widely used ultra-fast ultrasonic imaging method in recent years. The composite multi-angle plane wave imaging improves the imaging quality under the condition of slight loss rate. However, the common multi-angle coherent plane wave compounding (CPWC) method simply compounds data after delay and sum (DAS) of multiple angles, without considering the correlations of the data in a single angle and between multiple angles. In this paper, a plane wave imaging method combining spatial and angular sign coherence factors (asSCF) is proposed. The spatial sign coherence factor and the angular sign coherence factor are integrated into the beamforming process, and the correlation between signals is fully considered in order to improve the quality of multiangle composite imaging. The simulation experiment, imitation experiments and in vivo tissue experiment are carried out to compare the imaging effects of asSCF-CPWC method with the single sign coherence factor method and the traditional CPWC method. The results show that the asSCF-CPWC method has better lateral resolution and better imaging contrast.
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