Tomographic Schlieren imaging for measurement of beam pressure and intensity
Tomographic Schlieren imaging for measurement of beam pressure and intensity
复制标题
用于测量光束压力和强度的断层纹影成像
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
R. Kinnick
中科院分区：
文献类型：
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作者：
T. Pitts;J. F. Greenleaf;Jian;R. Kinnick
声光互作用显示超声场是一项古老的技术。阴影图和纹影成像分别产生表示与压力和时间平均强度相关的线积分的数据。这些“投影”可以用在计算机断层扫描中。我们比较了层析反演法重建的平面内压力分布与机械扫描0.5 mm校准水听器通过同一平面得到的压力分布。纹影方法的结果是重建时间平均强度近似。阴影图方法重建给定时间点的压力。层析成像方法的优点是它们可以快速完成。全自动系统可以在几分钟内生成超声束的三维图像
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