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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Statistical characterization of diffuse scattering in ultrasoundimages
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Statistical characterization of diffuse scattering in ultrasoundimages

机译：超声图像中弥散散射的统计表征

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摘要

The marginal statistics for the diffused ultrasound speckle echonhas been postulated as exhibiting circularly symmetric Gaussian behaviornsimilar to the laser speckle for monochromatic illumination under thenassumption of a large number of unresolvable scatterers per resolutionncell. This is known in the literature as the Rayleigh scatteringncondition. This paper presents a formal statistical test, thenKolmogorov-Smirnov nonparametric goodness of fit statistical test, tontest the hypothesis that the unresolvable part (diffuse part) of thenbackscatter echo follows a Rayleigh scattering condition, and obtainnnumerical values for the scatterer concentration required for thenRayleigh condition to be valid. In addition, it presents a formalnstatistical test, the Kolmogorov-Smirnov nonparametric homogeneitynstatistical test, to compare two regions of interest with differentnscattering concentrations without prior knowledge of the nature of thenscattering conditions (Rayleigh or non-Rayleigh scattering). Unlike allnprevious parametric testing methods that treat the A-scan or B-scan echonas a random sample, the authors' method presents formal tests based onnthe colored nature of the diffuse backscattered echo which is a morenrealistic model of the diffuse scattering component. The tests arendemonstrated on simulations of RF scans with different scatterernconcentrations per resolution cell as well as on phantom data whichnmimic tissue
机译：假设在每个分辨率ncell假设有大量不可分辨的散射体的情况下，散射超声散斑回波的边际统计数据表现出类似于激光散斑的圆对称高斯行为，类似于单色照明的激光散斑。这在文献中称为瑞利散射条件。本文提出了一种正式的统计检验，然后进行了Kolmogorov-Smirnov非参数拟合优度统计检验，检验了后向散射回波的不可分辨部分（散射部分）遵循瑞利散射条件的假设，并获得了当时瑞利条件满足条件的散射体浓度的数值有效。此外，它提出了形式统计检验，即Kolmogorov-Smirnov非参数同质性统计检验，用于比较两个具有不同散射浓度的目标区域，而无需事先了解散射条件的性质（瑞利散射或非瑞利散射）。与以往所有将A扫描或B扫描回波作为随机样本进行处理的参数测试方法不同，作者的方法基于漫反射背向散射回波的彩色性质提出了形式化测试，后者是漫散射分量的更真实的模型。测试是在每个分辨率单元具有不同散射浓度的RF扫描模拟以及模拟组织的幻像数据上进行的

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