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Comparison of ultrasonic motion estimators for vascular applications

机译：用于血管的超声运动估计器的比较

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摘要

One-dimensional (1D) motion estimators based on a phase shift of an ultrasonic echo signal have been used to estimate the axial strain of the artery. However, the lateral motion induced by the heartbeat cannot be neglected. Therefore, we proposed a two-dimensional (2D) phase-sensitive motion estimator previously. In this study, simulation experiments were performed to compare the accuracy of the 1D, 2D phase-sensitive, and speckle tracking methods. Furthermore, those three methods were applied to data obtained from a common carotid artery. The 2D phase-sensitive method showed the best accuracy among three, bias errors of 0.5% and standard deviations of 6.6% were obtained with respect to the estimated axial velocities in the simulation experiments. Meanwhile, the speckle tracking showed the best accuracy on the axial strain estimation, bias errors of 4.4% and standard deviations of 8.5% were obtained. In conclusion, the accuracy in the estimation of motion and strain was improved by considering the lateral motion. (C) 2019 The Japan Society of Applied Physics
机译：基于超声回波信号的相移的一维（1D）运动估计器已用于估计动脉的轴向应变。但是，不能忽略心跳引起的横向运动。因此，我们先前提出了二维（2D）相敏运动估计器。在这项研究中，进行了仿真实验以比较1D，2D相位敏感和散斑跟踪方法的准确性。此外，将这三种方法应用于从颈总动脉获得的数据。二维相敏方法显示了三者中的最佳精度，相对于估计的轴向速度，在模拟实验中获得了0.5％的偏差误差和6.6％的标准偏差。同时，散斑跟踪在轴向应变估计上显示出最佳精度，偏差误差为4.4％，标准偏差为8.5％。总之，通过考虑横向运动，可以提高运动和应变估计的准确性。 （C）2019日本应用物理学会

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  • 来源
    《Japanese journal of applied physics》 |2019年第sg期|SGGE16.1-SGGE16.7|共7页
  • 作者

    Miyajo Akira; Nagaoka Ryo; Hasegawa Hideyuki;

  • 作者单位

    Univ Toyama, Grad Sch Sci & Engn Res, Toyama 9308555, Japan;

    Univ Toyama, Grad Sch Sci & Engn Res, Toyama 9308555, Japan;

    Univ Toyama, Grad Sch Sci & Engn Res, Toyama 9308555, Japan;

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