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arXiv 1407.8196physics.med-ph
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软组织中洛伦兹力激发的剪切波成像

Imaging of Shear Waves Induced by Lorentz Force in Soft Tissues

Pol Grasland-Mongrain, Rémi Souchon, Florian Cartellier, Ali Zorgani, Jean-Yves Chapelon, Cyril Lafon, Stefan Catheline

摘要:

这项研究提出了第一次观察到的弹性剪切波产生的软固体使用动态电磁场。本研究的第一项和第二项实验表明,洛伦兹力可在软体模中引起位移,并且该位移可通过超声扫描仪使用斑点跟踪算法检测到。对于100 mT磁场和10 ms、100 mA峰-峰电脉冲串,位移达到1 μ m的量级。在第三个实验中,我们证明了洛伦兹力可以在体模中产生剪切波。提出了使用电磁和弹性方程的物理模型10。计算机模拟结果与实验结果吻合较好。在最后一个实验中,使用由洛伦兹力诱导的剪切波来估计猪肝样品的弹性。

英文摘要:

This study presents the first observation of elastic shear waves generated in soft solids using a dynamic electromagnetic field. The first and second experiments of this 5 study showed that Lorentz force can induce a displacement in a soft phantom and that this displacement was detectable by an ultrasound scanner using speckle-tracking algorithms. For a 100 mT magnetic field and a 10 ms, 100 mA peak-to-peak electrical burst, the displacement reached a magnitude of 1 um. In the third experiment, we showed that Lorentz force can induce shear waves in a phantom. A physical model 10 using electromagnetic and elasticity equations was proposed. Computer simulations were in good agreement with experimental results. The shear waves induced by Lorentz force were used in the last experiment to estimate the elasticity of a swine liver sample.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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