Measurement of surface acoustic waves in high-frequency ultrasound: Preliminary results
Measurement of surface acoustic waves in high-frequency ultrasound: Preliminary results
复制标题
高频超声中表面声波的测量：初步结果
DOI：
10.1109/embc.2017.8037488
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
B. Castañeda
中科院分区：
文献类型：
--
作者：
A. C. Saavedra;Fernando Zvietcovich;R. Lavarello;B. Castañeda
皮肤损伤会改变表面附近的弹性性质。在过去的几十年里，已经发展了几种非侵入性弹性成像技术来检测组织的机械特性。特别是，简谐弹性成像的特点是通过外部振子诱导剪切波传播，以估计剪切模数。然而，在边界附近，传播是由声表面波(SAW)控制的。本文将爬行波弹性成像技术与高频超声(HFUS)系统相结合，用来估计超声凝胶作为耦合界面时的锯切补偿因子。实验研究了具有固体-水界面的均匀体模中的声表面波速度，以证实理论发现。随后，在固体-US凝胶界面上进行了实验，以找到正确的补偿因子。初步结果表明，高频超声可以探测声表面波的传播，应用估计的经验修正因子可以生成剪切速度图。这项研究可能会避免在使用基于声表面波的高频超声弹性成像时低估剪切模数的问题，这对于更好地诊断皮肤病是有希望的。
Skin lesions change elastic properties near the surface. In the last decades, several non-invasive elastography techniques have been developed for detecting the mechanical properties of tissue. In particular, harmonic elastography is characterized for inducing shear wave propagation by an external vibrator in order to estimate shear modulus. However, near the boundary region, propagation is governed by surface acoustic waves (SAW). This paper combines crawling waves elastography with a high-frequency ultrasound (HFUS) system for the estimation of the SAW-to-shear compensation factor when ultrasound (US) gel is used as coupling interface. Experiments explore the SAWspeed in a homogeneous phantom with a solid-water interface in order to corroborate theoretical findings. Subsequently, experiments in a solid-US gel interface are conducted in order to find the correct compensation factor. Preliminary results suggest that SAW propagation can be detected using HFUS, and shear velocity maps can be generated by applying the estimated empirical correction factor. This study will potentially avoid the underestimation of shear modulus when using SAW-based HFUS elastography which is promising for the better diagnosis of skin diseases.
影响因子：
3.5
作者：
Han, Zhaolong;Aglyamov, Salavat R.;Larin, Kirill V.
通讯作者：
Larin, Kirill V.