Chen Shujie, Parker Kevin J
University of Rochester, Department of Electrical and Computer Engineering, Rochester, New York, United States.
J Med Imaging (Bellingham). 2017 Apr;4(2):027001. doi: 10.1117/1.JMI.4.2.027001. Epub 2017 May 8.
Ultrasound B-scan imaging systems operate under some well-known resolution limits. To improve resolution, the concept of stable pulses, having bounded inverse filters, was previously utilized for the lateral deconvolution. This framework has been extended to the axial direction, enabling a two-dimensional deconvolution. The modeling of the two-way response in the axial direction is discussed, and the deconvolution is performed in the in-phase quadrature data domain. Stable inverse filters are generated and applied for the deconvolution of the image data from Field II simulation, a tissue-mimicking phantom, and imaging of a carotid artery, where resolution enhancement is observed. Specifically, in simulation results, the resolution is enhanced by as many as 8.75 times laterally and 20.5 times axially considering the [Formula: see text] width of the autocorrelation of the envelope images.
超声B扫描成像系统在一些众所周知的分辨率限制下运行。为了提高分辨率，具有有界逆滤波器的稳定脉冲概念先前已用于横向去卷积。该框架已扩展到轴向，实现了二维去卷积。讨论了轴向双向响应的建模，并在同相正交数据域中进行去卷积。生成稳定的逆滤波器并将其应用于来自Field II模拟、组织模拟体模和颈动脉成像的图像数据的去卷积，在这些成像中观察到了分辨率增强。具体而言，在模拟结果中，考虑包络图像自相关的[公式：见正文]宽度，横向分辨率提高了多达8.75倍，轴向分辨率提高了20.5倍。
