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首页> 外文期刊>Japanese journal of applied physics >Time-resolved measurement of bubble cavitation by using power Doppler ultrasound image
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Time-resolved measurement of bubble cavitation by using power Doppler ultrasound image

机译:功率多普勒超声图像对气泡空化的时间分辨测量

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摘要

In this study, a novel measurement method for a secondary ultrasound wave irradiated by microbubble cavitation is proposed. High-intensity ultrasound (h-US, 1.0-1.5 MPa), which produces bubble cavitation, is irradiated with a fixed time delay after introducing imaging US, whose frequency is different from that of the h-US. The bubble cavitation signal (BCS) is detected by the signal-processing unit of an ultrasound power Doppler imaging instrument. By this method, both a spatially resolved bubble image (S-image) and the temporal transition of the BCS (T-image) are monitored simultaneously. A feature of the method is that the BCS is observed in situ with sub-mu s time resolution. The accuracy of the method is evaluated and it is found that the maximum deviation of the amplitude of the simulated BCS is 4.80%. This method is applied to measure the BCS of ultrasound contrast agent microbubbles. As a result, the dependence of the inherent temporal transition of the BCS on the sound pressure of the h-US (0.6-1.2 MPa) is observed. (C) 2017 The Japan Society of Applied Physics.
机译:在这项研究中,提出了一种新的测量微泡空化辐射的二次超声波的方法。引入气泡US后,以固定的时间延迟照射产生气泡空化的高强度超声(h-US,1.0-1.5 MPa),其频率不同于h-US。气泡空化信号(BCS)由超声功率多普勒成像仪的信号处理单元检测。通过这种方法,可以同时监视空间分辨的气泡图像(S图像)和BCS的时间转换(T图像)。该方法的一个特点是可以以亚μs的时间分辨率原位观察BCS。对该方法的准确性进行了评估,发现模拟的BCS幅度的最大偏差为4.80%。该方法用于测量超声造影剂微泡的BCS。结果,观察到BCS的固有时间转变对h-US的声压(0.6-1.2MPa)的依赖性。 (C)2017年日本应用物理学会。

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  • 来源
    《Japanese journal of applied physics》 |2017年第4期|047201.1-047201.7|共7页
  • 作者单位

    Gunma Univ, Grad Sch Sci & Technol, Kiryu, Gunma 3768515, Japan;

    Gunma Univ, Grad Sch Sci & Technol, Kiryu, Gunma 3768515, Japan;

    Gunma Univ, Grad Sch Sci & Technol, Kiryu, Gunma 3768515, Japan;

    Gunma Univ, Grad Sch Sci & Technol, Kiryu, Gunma 3768515, Japan;

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