Circular-array ultrasound holography imaging using the linear-array approach
Circular-array ultrasound holography imaging using the linear-array approach
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DOI：
10.1109/58.31792
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
Z. Qin;J. Ylitalo;J. Oksman
中科院分区：
文献类型：
--
作者：
Z. Qin;J. Ylitalo;J. Oksman
提出了一种圆阵脉冲回波超声全息成像方法。测量系统的配置比传统的计算机断层扫描（CT）和复合扫描成像简单得多。采用宽波束非相干化。在全息图的频域中，对圆形阵列与线性阵列的几何差异进行了校正。圆形图像重建过程的计算时间与采用反向传播（BP）原理的线性阵列成像过程的计算时间几乎相同。在重建过程中直接使用快速傅里叶变换（FFT）算法。计算机仿真表明，该成像方法的分辨率可以超过线性阵列成像系统。在初步实验中，超声频率为2mhz .>，横向和径向分辨率均达到2mm
A circular-array, pulse-echo, ultrasound holography imaging method is presented. The configuration of the measurement system is much simpler than that of traditional computed-tomography (CT) and compound beta -scan imaging. Wide-beam insonification is used. The geometrical differences of the circular array compared with a linear array system are corrected in the frequency domain of the hologram. The computation time of the reconstruction process for a circular image is practically the same as that of a linear array imaging process using the backward propagation (BP) principle. A fast Fourier transform (FFT) algorithm is directly used in the reconstruction process. Computer simulation shows that the resolution of this imaging method can surpass that of a linear-array system. In the preliminary experiments, 2-mm resolution was achieved in both the lateral and radial directions with an ultrasound frequency of 2 MHz.>