Nonlinear Acoustic Shadow Method to Reduce Reverberation Artifact
Nonlinear Acoustic Shadow Method to Reduce Reverberation Artifact
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DOI：
10.4236/jfcmv.2016.42005
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发表时间：
2016-04
期刊：
影响因子：
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通讯作者：
K. Fujisawa;A. Asada
中科院分区：
文献类型：
--
作者：
K. Fujisawa;A. Asada
本文提出了一种利用非线性超声相互作用减少声影成像混响伪影的新方法——非线性声影法。该技术利用参数阵列发射的两个主声波非线性相互作用产生的二次波对传统声影法进行了改进。对铝方柱进行了常规声阴影成像和非线性声阴影成像，并比较了声阴影的大小。结果表明，非线性声影法减少了方柱内部混响伪影，在尺寸测量上具有比传统声影法更高的精度。
A novel technique for reducing reverberation artifact in acoustic shadow imaging using nonlinear ultrasound interaction, called nonlinear acoustic shadow method, has been developed and experimentally studied. In this technique, the conventional acoustic shadow method is modified by using the secondary wave generated by nonlinear interaction of two primary sound waves emitted from parametric array. Either conventional or nonlinear acoustic shadow imaging is carried out for aluminum square cylinder and the size of the shadow is compared. The result shows that the nonlinear acoustic shadow method reduces reverberation artifact inside the square cylinder and has better accuracy in the size measurement than conventional acoustic shadow method.