A new approach to compensate the geometric distortion in the synthetic aperture ultrasonic imaging system.
A new approach to compensate the geometric distortion in the synthetic aperture ultrasonic imaging system.
复制标题
补偿合成孔径超声成像系统几何畸变的新方法
DOI：
10.3233/bme-151461
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发表时间：
2015
影响因子：
1
通讯作者：
Qin Zhengdi
中科院分区：
文献类型：
--
作者：
He Xiaonian;Liu Weixiang;Chen Siping;Qin Zhengdi
在超声成像技术领域中，经常遇到几何畸变的问题，特别是在超声近场成像中。本文提出了一种补偿合成孔径超声成像系统几何畸变的新方法。该方法是基于合成孔径超声全息b扫描（UHB）成像系统，它是基于反向传播原理的超声全息与传统b扫描技术的结合。为了解决几何失真问题，介绍了空间压缩和频域重采样的操作。该方法的主要优点是利用空间频率压缩后的空间插值函数可以不失真地计算出真实全息值。在对几何畸变进行补偿后，将基于反向传播原理的合成孔径技术应用于二维数值成像重建过程。仿真和实测实验表明，该方法是可行的。可以有效地补偿与波前角有关的几何畸变。在整个深度范围内，空间分辨率几乎是均匀的，在实验中接近理论极限。
In the field of ultrasonic imaging technology, the problem of geometric distortion is often encountered, especially in the ultrasonic near-field. In this study, a new approach is proposed to compensate for geometric distortion in the synthetic aperture ultrasonic imaging system. This approach is based on the synthetic aperture ultrasonic holographic B-scan (UHB) imaging system, which is a combination of ultrasonic holography based on the backward propagation principle and the conventional B-scan technique. To solve the geometric distortion problem, the operation of the spatial compression and resampling in the frequency domain are introduced. The main advantage of the approach is that the real holographic value can be calculated without distortion by using the spatial interpolation function after the spatial frequency compression. After the compensation for geometric distortion is performed, the synthetic aperture technique based on the backward propagation principle is then applied in the process of the two-dimensional numerical imaging reconstruction. Both the simulation and measurement experiment show that the approach is promising. The geometric distortion that is dependent on the wave front angle can be effectively compensated. The spatial resolution is practically uniform throughout the depth range and close to the theoretical limit in the experiments.
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DOI：
10.1109/t-uffc.1986.26889
发表时间：
1986
期刊：
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
影响因子：
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作者：
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通讯作者：
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发表时间：
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期刊：
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影响因子：
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作者：
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通讯作者：
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发表时间：
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期刊：
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
影响因子：
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发表时间：
1989
期刊：
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
影响因子：
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作者：
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通讯作者：
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发表时间：
1989
期刊：
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
影响因子：
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作者：
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通讯作者：
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