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浙江大学学报(工学版)
环境工程、生物医学工程     
基于平面波的高帧频向量血流成像
周密,周浩,郑音飞
浙江大学 生物医学工程教育部重点实验室,浙江 杭州 310027
High frame-rate blood vector velocity imaging using  plane-wave ultrasound
ZHOU Mi, ZHOU Hao, ZHENG Yin fei
Key Laboratory for Biomedical Engineering of Ministry of Education, Zhejiang University, Hangzhou 310027, China
 全文: PDF(1930 KB)   HTML
摘要:

针对传统医学超声血流成像中成像帧频低、检测结果依赖于血流方向的问题,提出高帧率二维向量血流成像方法.该方法结合了平面波成像、多合成孔径成像、二维自相关以及空间复合成像等技术.在接收模式下,采用左、右两个子孔径进行偏转角度波束形成,获得横向与轴向的血流速度信息.向量血流成像方法的有效性经过了Field II仿真实验、仿体实验及在体实验的验证.仿真实验表明:轴向血流速度的估计误差约为0.035 m/s,估计方差约为0.0013 m/s;横向血流估计误差约为0.08 m/s,标准差约为0.009 m/s;通过与近期发表的平面波向量血流成像方法进行对比,本文方法的横向估计速率提高了0.02 m/s,轴向估计速率提高了0.003 m/s.通过沿不同角度多次发射平面波,采用复合成像技术,血流估计的稳定性得到了极大的改善.

Abstract:

A high frame-rate two-dimensional vector flow imaging method was proposed to overcome the low frame-rate and the angle-dependency problems in traditional medical ultrasound flow imaging. The proposed method combined the plane wave imaging, multi-synthetic aperture, two-dimensional autocorrelation and spatial compound. The steered beamforming was performed only during receiving on two independent subapertures, left and right, respectively. Lateral and axial flow velocity components were obtained. The effectiveness of the method was verified by the Field II simulation, in vitro and in vivo experiments. Simulation results showed that the bias of axial velocity estimation was around 0.035 m/s and the standard variance was about 0.001 3 m/s. The bias and the standard variance of lateral estimates were about 0.08 m/s and 0.009 m/s, respectively. The bias of lateral velocity estimate increased by 0.02 m/s and the bias of axial velocity estimate increased by 0.003 m/s compared with the recent published method. The stability of the estimate was improved by tilting the emitting plane wave for each plane-wave transmission and spatial compounding.

出版日期: 2016-07-23
:  TN 98  
基金资助:

中央高校基本科研业务费专项资金资助项目(2015FZA5019, 2016FZA5015).

通讯作者: 郑音飞,男,副教授. ORCID: 0000-0001-6837-2634.     E-mail: zyfnjupt@126.com
作者简介: 周密(1992-),硕士生,从事医学超声成像技术研究. ORCID: 0000-0002-3986-520X.
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引用本文:

周密,周浩,郑音飞. 基于平面波的高帧频向量血流成像[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.07.026.

ZHOU Mi, ZHOU Hao, ZHENG Yin fei. High frame-rate blood vector velocity imaging using  plane-wave ultrasound. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.07.026.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.07.026        http://www.zjujournals.com/eng/CN/Y2016/V50/I7/1410

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