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首页> 外文期刊>Ultrasound in Medicine and Biology >Simulation study of effects of speed of sound and attenuation on ultrasound lateral resolution.
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Simulation study of effects of speed of sound and attenuation on ultrasound lateral resolution.

机译：声速和衰减对超声横向分辨率影响的仿真研究。

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Experiments have shown that the lateral profile of a point target measured with a clinical ultrasound scanner is wider when the target is embedded in a urethane phantom than when it is in a traditional gel phantom. The behavior has been attributed to the low speed of sound in the urethane material, with the possibility that some of the broadening is caused by increased attenuation in this material. In this paper we apply a computer simulation model to study this behavior. Lateral beam profiles modeled for targets within a medium having a speed of sound and an attenuation matching that of urethane are compared with profiles for targets in a water-based gel. Simulations yield results that agree qualitatively with published experimental results. The lateral profile broadening in urethane is caused by the 6 % mismatch between speed of sound in this material and the speed of sound assumed in the receive focusing and beam forming. Attenuation plays a lesser role than the mismatch of the speed of sound. (E-mail: ).
机译：实验表明，当将目标嵌入尿烷体模中时，用临床超声扫描仪测量的点靶的横向轮廓要比传统凝胶体模中的宽。该行为归因于氨基甲酸酯材料中的低声速，并有可能由于该材料的衰减增加而导致一些变宽。在本文中，我们应用计算机仿真模型来研究这种行为。将针对声速和衰减与氨基甲酸酯相匹配的介质中的目标建模的横向束轮廓与水基凝胶中目标的轮廓进行比较。模拟得出的结果与已发布的实验结果在质量上相符。氨基甲酸酯的横向轮廓变宽是由于这种材料中的声速与接收聚焦和波束形成中假定的声速之间存在6％的不匹配引起的。衰减起的作用要小于声音速度的不匹配。 （电子邮件：）。

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