Frequency domain compensation for inhomogeneous layers in ultrasound holography
Frequency domain compensation for inhomogeneous layers in ultrasound holography
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DOI：
10.1109/58.16971
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
Z. Qin;A. Tauriainen;J. Ylitalo;E. Alasaarela;W. Lu
中科院分区：
文献类型：
--
作者：
Z. Qin;A. Tauriainen;J. Ylitalo;E. Alasaarela;W. Lu
提出了一种基于超声全息B超成像原理的频域补偿方法。在声学成像系统中，由于各种已知的非均匀原因引起的波前角度相关的失真可以通过这种方法得到补偿。这里在频域中对纵向失真采用所谓的后测距运算，对横向失真采用相位因子相乘。该方法特别适用于声成像系统中不同速度层的补偿。计算机模拟和水箱实验的结果都是令人振奋的。
A frequency-domain compensation method is presented that is based on the ultrasound holography B-scan (UHB) imaging principle. In an acoustic imaging system, the wavefront-angle-dependent distortions caused by any kind of known inhomogeneous reason can be compensated by this method. It is applied here in the frequency domain using the so-called rear-ranging operation for the longitudinal distortion and the multiplication of phase factors for the lateral distortion. The method is especially suitable for compensating different velocity layers in acoustic imaging systems. The results of both computer simulations and water-tank experiments are promising.>