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Experimental Validation of Displacement Vector Measurement Based on Two-Dimensional Modulation Method with Virtual Hyperbolic Scanning

机译:基于虚拟双曲扫描的二维调制方法的位移矢量测量实验验证

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摘要

We have proposed a new modulation method that can generate modulated RF signals with oscillation in two mutually orthogonal directions over a wide, deep area using a small-aperture probe. We had also shown the validity of the method by numerical simulations in a previous work. In this study, we applied the method to an experimental system and validated it by phantom experiments. In numerical simulation, point-source transmission has been performed, but in practical measurement, it does not acquire a sufficient signal-to-noise ratio (SNR) for estimating displacement because of its low output power. A spatially coded excitation, Hadamard spatial coding, was employed to increase SNR. An experiment on wire targets indicated that the proposed method can modulate the RF signal correctly, and an experiment on elasticity imaging suggested that it enables us to estimate displacement in axial and lateral directions with high precision.
机译:我们提出了一种新的调制方法,该方法可以使用小孔径探头在宽而深的区域中产生两个相互正交的方向上的振荡的已调制RF信号。在先前的工作中,我们还通过数值模拟证明了该方法的有效性。在这项研究中,我们将该方法应用于实验系统,并通过幻像实验对其进行了验证。在数值模拟中,已经执行了点源传输,但是在实际测量中,由于其低输出功率,它没有获得足够的信噪比(SNR)来估计位移。采用空间编码的激励,即Hadamard空间编码,以提高SNR。在导线目标上进行的实验表明,该方法可以正确调制RF信号,而在弹性成像方面的实验表明,该方法可以使我们高精度地估计轴向和横向的位移。

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  • 来源
    《Japanese journal of applied physics》 |2012年第7issue2期|p.07GF10.1-07GF10.6|共6页
  • 作者单位

    Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan;

    Advanced Biomedical Enaineerina Research Unit, Kvoto Universitv, Kvoto 606-8507, Japan;

    Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan;

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