Ensemble tracking for 2D vector velocity measurement: Experimental and initial clinical results

Bohs L.N.; Geiman B.J.

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Ensemble tracking for 2D vector velocity measurement: Experimental and initial clinical results

机译：集成跟踪以进行2D矢量速度测量：实验和初始临床结果

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We describe a new method, called ensemble tracking, for estimating two-dimensional velocities with ultrasound. Compared to previous speckle tracking techniques, ensemble tracking measures motion over smaller times and distances, increasing maximum velocities and reducing errors due to echo decorrelation. Ensemble tracking uses parallel receive processing, 2D pattern matching, and interpolation of the resulting tracking grid to estimate sub-pixel speckle translations between successive ultrasonic acquisitions. In this study, small translations of a tissue mimicking phantom were quantified at transducer angles of 0/spl deg/, 45/spl deg/, and 90/spl deg/. Measurements over three parallel beam spacings and all transducer angles had mean errors from -4% to +11%, when parallel beam amplitudes were normalized. Such amplitude normalization substantially improved results at 45/spl deg/ and 90/spl deg/. The amplitude, spacing, and correlation between the parallel beams were quantified, and their effects on the accuracy and precision of estimates are discussed. Finally, initial clinical results demonstrate the ability to track and display blood flow in the carotid artery.

机译：我们描述了一种称为集合跟踪的新方法，用于估计超声的二维速度。与以前的散斑跟踪技术相比，集成跟踪可在更短的时间和距离内测量运动，从而提高最大速度并减少由于回声解相关而引起的误差。集合跟踪使用并行接收处理，2D模式匹配以及所得跟踪网格的插值来估计连续超声采集之间的子像素斑点平移。在这项研究中，模拟体模的小平移在传感器角度0 / spl deg /，45 / spl deg /和90 / spl deg /下进行了定量。当对平行光束幅度进行归一化时，在三个平行光束间隔和所有换能器角度上的测量结果的平均误差为-4％至+ 11％。这样的幅度归一化在45 / spl deg /和90 / spl deg /下显着改善了结果。量化了平行光束之间的幅度，间距和相关性，并讨论了它们对估计精度和精确度的影响。最后，初步的临床结果证明了跟踪和显示颈动脉血流的能力。

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《IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control》 |1998年第4期|P.912-924|共13页
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Bohs L.N.; Geiman B.J.;
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1. Ensemble tracking for 2D vector velocity measurement: Experimentaland initial clinical results [J] . Bohs L.N., Geiman B.J., Anderson M.E., IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control . 1998,第4期

机译：集成跟踪以进行2D矢量速度测量：实验和初步临床结果
2. Velocity vector imaging in the measurement of left ventricular twist mechanics: head-to-head one way comparison between speckle tracking echocardiography and velocity vector imaging. [J] . Kim DH, Kim HK, Kim M Journal of the American Society of Echocardiography: official publication of the American Society of Echocardiography . 2009,第12期

机译：左心室扭转力学测量中的速度矢量成像：散斑跟踪超声心动图和速度矢量成像之间的头对头比较。
3. Angular velocity estimation from measurement vectors of star tracker [J] . Hai-bo Liu, Jun-cai Yang, Wen-jun Yi, Applied optics . 2012,第16期

机译：根据恒星跟踪仪的测量矢量估算角速度
4. Initial experimental results using ensemble tracking for 2D vector velocity measurement [C] . Gelman, B., Bohs, . 1996

机译：使用集成跟踪进行2D矢量速度测量的初步实验结果
5. Optimal vector interpolation of asynoptic spatial survey of vector quantities for interpolating ADCP water velocity measurements. [D] . Khosravan Najafabadi, Shohreh. 2006

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6. Validity and Reliability of Three-chamber-View Three-directional Encoded Phase-contrast Magnetic Resonance Velocity-Vector Mapping for Transmitral Velocity Measurements: Comparison with Doppler Echocardiography and Intra- and Inter-observer Variability [O] . Munemura Suzuki, Norihiko Kotooka, Masashi Sakuma, 2017

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Ensemble tracking for 2D vector velocity measurement: Experimental and initial clinical results

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