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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >C- and D-weighted ultrasonic imaging using the translating apertures algorithm
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C- and D-weighted ultrasonic imaging using the translating apertures algorithm

机译：使用平移孔径算法的C和D加权超声成像

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Conventional ultrasonic imaging systems depict tissue backscatter, that is, the ultrasonic energy reflected directly back toward the transmitter. Although diagnostically useful, these systems fail to exploit the information available in components of the sound field scattered in other directions. This paper describes a new method of imaging this angular scatter. First, the translating apertures algorithm (TAA) is used to acquire data at two scattering angles. Then, these data are processed to yield an image of the common scattering with angle and the differential scattering with angle. This paper explores the potential of these common-weighted (c-weighted) and difference-weighted (d-weighted) images using theory and simulations. In addition, it describes and analyzes the performance of the TAA when it is applied using multiple receive elements. Analysis is presented that shows that, in Rayleigh scattering environments, c- and d-weighted images depict compressibility and density variations, respectively. A simulated image and accompanying analysis are presented that show the potential of these techniques to improve soft tissue contrast and to increase the detectability of microcalcifications. A comparison with previous angular scatter measurement techniques shows that use of the TAA significantly reduces statistical variability in measured angular scatter profiles. Spatially localized, statistically reliable angular scatter measurements will enable a broad range of angular scatter imaging techniques. C- and d-weighted imaging may ultimately he applied clinically to identify calcification in atherosclerotic plaques and breast tumors.
机译：常规的超声成像系统描绘了组织反向散射，即超声能量直接反射回发射器。尽管在诊断上很有用，但这些系统无法利用散布在其他方向的声场分量中的可用信息。本文介绍了一种对这种角度散射进行成像的新方法。首先，平移孔径算法（TAA）用于获取两个散射角的数据。然后，处理这些数据以产生具有角度的公共散射和具有角度的微分散射的图像。本文使用理论和模拟方法探索了这些常见加权（c加权）和差分加权（d加权）图像的潜力。此外，它还描述并分析了使用多个接收元件应用TAA时的性能。分析表明，在瑞利散射环境中，c加权图像和d加权图像分别描述了可压缩性和密度变化。呈现的模拟图像和伴随的分析显示了这些技术改善软组织对比度并增加微钙化的可检测性的潜力。与以前的角散射测量技术的比较表明，使用TAA可以显着减少所测量的角散射轮廓的统计差异。空间上局部的，统计上可靠的角度散射测量将使范围广泛的角度散射成像技术成为可能。 C加权和D加权成像最终可能会在临床上最终应用于识别动脉粥样硬化斑块和乳腺肿瘤中的钙化。

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