横断面多普勒鲁棒流量监测的自适应传输序列。

IF 3 2区 工程技术 Q1 ACOUSTICS
Luuk van Knippenberg;R. Arthur Bouwman;Ruud J. G. van Sloun;Massimo Mischi
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引用次数: 0

摘要

多普勒超声是一种测量血流速度的无创成像技术,常用于心脏评估和血管评估。与传统的纵向视图相比,横截面多普勒对运动的鲁棒性更强,使其更适合监测应用。在本文中,提出了一个自适应的框架,自动监测流量在颈总动脉使用横断面多普勒。基于船舶分割和几何估计,自适应调整发射参数,如焦点、转向角和孔径宽度,以优化多普勒角和最大信噪比。沿单线使用多个栅极估计速度剖面,从而获得具有高时间分辨率的速度估计。通过实验设计,利用模拟和模拟数据,探讨了相关非自适应超声参数的影响和最佳设置。这些优化参数可以准确地估计出平均流速,平均误差为0.8%,体外平均误差为1.6%。此外,与传统逐行扫描相比,速度估计显示出更小的方差和更高的时间分辨率。该方法的可行性也在体内得到了证明,在体内观察到不同范围的速度分布。这些结果表明,该方法可用于自动血流监测或通过血流动力学建模估计心输出量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Adaptive Transmit Sequencing for Robust Flow Monitoring in Cross-Sectional Doppler
Doppler ultrasound is a noninvasive imaging technique that measures blood flow velocity and is commonly used in cardiac evaluation and vascular assessment. Compared to the conventional longitudinal view, cross-sectional Doppler is more robust to motion, making it more suitable for monitoring applications. In this article, an adaptive framework is presented to automatically monitor flow in the common carotid artery using cross-sectional Doppler. Based on vessel segmentation and geometry estimation, transmit parameters such as the focal point, steering angle, and aperture width are adaptively adjusted to optimize the Doppler angle and maximize signal-to-noise ratio (SNR). The velocity profile is estimated using multiple gates along a single line, resulting in velocity estimates with high temporal resolution. The effect and optimal settings of relevant nonadaptive ultrasound parameters are explored through a design of experiments (DoE), making use of simulated and phantom data. These optimal parameters result in accurate estimates of average velocity with a mean error of 0.8% in silico and 1.6% in vitro. In addition, velocity estimates show a reduced variance and improved temporal resolution compared to conventional line-by-line scanning. Feasibility of the method is also demonstrated in vivo, where a diverse range of velocity profiles was observed. These findings suggest that this method could be feasible for automatic flow monitoring or cardiac output estimation through hemodynamic modeling.
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来源期刊
CiteScore
7.70
自引率
16.70%
发文量
583
审稿时长
4.5 months
期刊介绍: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control includes the theory, technology, materials, and applications relating to: (1) the generation, transmission, and detection of ultrasonic waves and related phenomena; (2) medical ultrasound, including hyperthermia, bioeffects, tissue characterization and imaging; (3) ferroelectric, piezoelectric, and piezomagnetic materials, including crystals, polycrystalline solids, films, polymers, and composites; (4) frequency control, timing and time distribution, including crystal oscillators and other means of classical frequency control, and atomic, molecular and laser frequency control standards. Areas of interest range from fundamental studies to the design and/or applications of devices and systems.
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