用于测量光束压力和强度的层析纹影成像

T. Pitts, J. F. Greenleaf, Jian-yu Lu, R. Kinnick
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引用次数: 23

摘要

利用声光相互作用实现超声场的可视化是一项古老的技术。暗影成像和纹影成像产生的数据分别代表与压力和时间平均强度相关的线积分。这些“投影”可用于计算机断层扫描。我们比较了通过层析反演获得的平面内重建压力分布与通过同一平面机械扫描0.5 mm校准水听器获得的压力分布。纹影法的结果是重建一个时间平均强度近似。阴影图方法在给定的时间点重建压力。层析成像方法的优点是可以快速完成。一个完全自动化的系统可以在几分钟内产生超声波束的三维图像
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Tomographic Schlieren imaging for measurement of beam pressure and intensity
The visualization of ultrasonic fields via acousto-optic interaction is an old technique. Shadowgraph and schlieren imaging produce data representing a line integral related to pressure and time-average intensity, respectively. These “projections” can be used in computed tomography. We have compared the reconstructed pressure distribution in a plane obtained via tomographic inversion with those obtained by mechanically scanning a 0.5 mm calibrated hydrophone through the same plane. Schlieren methods result in the reconstruction of a time average intensity approximation. Shadowgraph methods reconstruct pressure at a given point in time. The advantage of the tomographic methods is that they can be done quickly. A fully automated system could produce a three-dimensional image of an ultrasound beam in a few minutes
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