A numerical model for three-dimensional echo decorrelation imaging, a pulse-echo ultrasound method applicable to thermal ablation monitoring, is presented. Beam patterns for steered transmit and receive array apertures are combined with a three-dimensional numerical tissue model to yield beamformed scan lines in a pyramidal configuration, volumetric B-mode images, and spatial maps of normalized decorrelation between sequential image volumes. Simulated three-dimensional echo decorrelation images of random media are analyzed as estimators of local tissue reflectivity decoherence, mimicking thermal ablation effects. The estimation error is analyzed as a function of correlation window size, scan line density, and ensemble averaging of decorrelation maps.

中文翻译：

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三维回波去相关成像的数值分析。

提出了三维回波去相关成像的数值模型，一种适用于热消融监测的脉冲回波超声方法。用于操纵的发射和接收阵列孔径的光束图案与三维数值组织模型相结合，以产生金字塔状的束状扫描线，体积B模式图像以及顺序图像体积之间归一化去相关的空间图。分析模拟的随机介质的三维回波去相关图像，作为局部组织反射率去相干的估计量，模拟热消融效果。根据相关窗口大小，扫描线密度和去相关图的集合平均来分析估计误差。