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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Ultrasonic tissue characterization using a generalized Nakagami model
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Ultrasonic tissue characterization using a generalized Nakagami model

机译：使用广义Nakagami模型进行超声组织表征

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摘要

The statistics of the backscattered ultrasonic echo from tissue have been described using Rayleigh, K, and Nakagami distributions. The Nakagami and K distributions, each with two parameters, can model the envelope reasonably well. However, a three-parameter distribution is likely to match the envelope of the backscattered echo much better than these two-parameter distributions. Starting with the Nakagami distribution and including an additional parameter to account for the tails of the density function, a generalized Nakagami distribution has been derived. Computer simulation of A-scans and analysis of data collected from tissue-mimicking phantoms show that the generalized Nakagami distribution fits the statistics of the echo of the envelope better than the Nakagami distribution. The parameters of the generalized Nakagami distribution appear to be far more sensitive to the scattering conditions than the parameters of the Nakagami distribution.
机译：来自组织的反向散射超声回波的统计数据已使用Rayleigh，K和Nakagami分布进行了描述。分别具有两个参数的Nakagami和K分布可以很好地模拟包络。但是，三参数分布可能比这些两参数分布更好地匹配反向散射回波的包络。从Nakagami分布开始，并包括一个说明密度函数尾部的附加参数，得出了广义的Nakagami分布。 A扫描的计算机模拟和从组织模拟体模收集的数据的分析表明，广义的Nakagami分布比Nakagami分布更适合包络回波的统计。广义的Nakagami分布的参数似乎比Nakagami分布的参数对散射条件更敏感。

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