Filter-based coded-excitation system for high-speed ultrasonic imaging.
Filter-based coded-excitation system for high-speed ultrasonic imaging.
复制标题
用于高速超声成像的基于滤波器的编码激励系统。
DOI：
10.1109/42.746625
复制
发表时间：
1998
影响因子：
10.6
通讯作者：
Ebbini,ES
中科院分区：
文献类型：
--
作者：
Shen,J;Ebbini,ES
作者最近提出了一种用于实时三维成像的超声脉冲回波数据高速并行处理的新算法。该方法利用传统波束形成器对感兴趣区域（ROI）接收到的回波数据进行离散化线性模型处理。发射机阵列单元输入二进制码，以在ROI中产生不同方向的不同脉冲响应。利用线性接收信号模型导出的正则化伪逆算子实现ROI图像重建。重建算子可以使用一个横向滤波器组来实现，其中每个滤波器组都设计用于从ROI的特定方向提取回波。滤波器的数量决定了同时获取的图像线的数量。在本文中，作者提出了基于他们的公式重建囊肿幻像的图像。讨论了图像重建中一些具有实际意义的问题。具体来说，引入了一个增强模型来解释ROI外部回波的不完全阻塞。作者还介绍了一种列加权算法，用于最小化过滤系数的数量。此外，还详细说明了使用子图像采集和复合的全图像重建方法。实验结果表明，该方法适用于医学成像系统中常见的散斑生成幻象相控阵脉冲回波成像。据作者所知，这种基于编码兴奋的图像重建方法是基于产生斑点的幻影的，以前还没有报道过。
The authors have recently presented a new algorithm for high-speed parallel processing of ultrasound pulse-echo data for real-time three-dimensional (3-D) imaging. The approach utilizes a discretized linear model of the echo data received from the region of interest (ROI) using a conventional beam former. The transmitter array elements are fed with binary codes designed to produce distinct impulse responses from different directions in ROI. Image reconstruction in ROI is achieved with a regularized pseudoinverse operator derived from the linear receive signal model. The reconstruction operator can be implemented using a transversal filter bank with every filter in the bank designed to extract echoes from a specific direction in the ROI. The number of filters in the bank determines the number of image lines acquired simultaneously. In this paper, the authors present images of a cyst phantom reconstructed based on their formulation. A number of issues of practical significance in image reconstruction are addressed. Specifically, an augmented model is introduced to account for imperfect blocking of echoes from outside the ROI. The authors have also introduced a column-weighting algorithm for minimizing the number of filter coefficients. In addition, a detailed illustration of a full image reconstruction using subimage acquisition and compounding is given. Experimental results have shown that the new approach is valid for phased-array pulse-echo imaging of speckle-generating phantoms typically used in characterizing medical imaging systems. Such coded-excitation-based image reconstruction from speckle-generating phantoms, to the best of the authors' knowledge, have not been reported previously.
用于 3D 实时声学成像的最佳横向滤波器组
DOI：
10.1109/acssc.1992.269156
发表时间：
1992
期刊：
[1992] Conference Record of the Twenty-Sixth Asilomar Conference on Signals, Systems & Computers
影响因子：
--
作者：
E. Ebbini
通讯作者：
E. Ebbini
改进基于 SVD 的检测算法的银行判定
DOI：
10.1109/acssc.1990.523330
发表时间：
1990
期刊：
1990 Conference Record Twenty-Fourth Asilomar Conference on Signals, Systems and Computers, 1990.
影响因子：
--
作者：
J. Cozzens;M. J. Sousa
通讯作者：
M. J. Sousa