利用深度相关不匹配滤波提高医学超声成像的分辨率和动态范围

A. R. Brenner, K. Eck, W. Wilhelm, T. Noll
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引用次数: 14

摘要

作者提出了一种深度相关的非匹配滤波器脉冲压缩技术,与匹配滤波器脉冲压缩相比,该技术提高了编码激发超声成像的范围分辨率和动态范围。在选择合适的幅值谱后,利用频率加权设计合适的非匹配深度滤波器,实现对主瓣宽度和副瓣特性的控制。通过仿真和实测验证了该技术的有效性。一个深度相关的不匹配滤波器的VLSI实现是可行的。
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Improved resolution and dynamic range in medical ultrasonic imaging using depth-dependent mismatched filtering
The authors present a depth-dependent mismatched-filter pulse compression technique which improves range resolution and dynamic range of coded excitation ultrasonic imaging compared to a matched-filter pulse compression. After choosing a suitable magnitude spectrum, frequency weighting is used to design the appropriate mismatched filter depth-dependently, which allows to control mainlobe width and sidelobe characteristics. Both simulations and measurements are used to demonstrate the efficacy of the technique. A VLSI implementation of a depth-dependent mismatched filter is shown to be feasible.
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