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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Phase aberration correction using ultrasound radiation force and vibrometry optimization
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Phase aberration correction using ultrasound radiation force and vibrometry optimization

机译：利用超声辐射力和振动测量优化进行相差校正

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摘要

We describe a phase aberration correction method that uses dynamic ultrasound radiation force to harmonically vibrate an object using amplitude modulated continuous wave ultrasound. The phase of each element of an annular array transducer is adjusted to maximize the radiation force and obtain optimal focus of the ultrasound beam. The maximization of the radiation force is performed by monitoring the velocity of scatterers in the focus region. We present theory that shows focal optimization with radiation force has a well-behaved cost function. Experimental validation is shown by correction of manual defocusing of an annular array as well as correcting for a lens-shaped aberrator placed near the transducer. A Doppler laser vibrometer and a pulse-echo Doppler ultrasound method were used to monitor the velocity of a sphere used as a target for the transducer. By maximizing the radiation force-induced vibration of scatterers in the focal region, the resolution of the ultrasound beam can be recovered after aberration defocusing.
机译：我们描述了一种相位像差校正方法，该方法使用动态超声辐射力使用调幅连续波超声来谐波振动对象。调节环形阵列换能器的每个元件的相位以最大化辐射力并获得超声束的最佳聚焦。辐射力的最大化是通过监视焦点区域中散射体的速度来执行的。我们提出的理论表明，利用辐射力进行焦点优化具有良好的成本函数。通过校正环形阵列的手动散焦以及校正放置在换能器附近的透镜形像差器，可以显示实验验证。多普勒激光振动计和脉冲回波多普勒超声方法用于监测用作换能器目标的球体的速度。通过最大化由辐射力引起的聚焦区域中散射体的振动，可以在像差散焦后恢复超声束的分辨率。

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