时间分辨二维脉冲弹性成像中的低频剪切波束形成

2000 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.00CH37121) Pub Date : 2000-10-22 DOI:10.1109/ULTSYM.2000.921673

L. Sandrin, M. Tanter, D. Cassereau, S. Catheline, M. Fink

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引用次数: 2

摘要

我们已经表明，在过去的时间分辨二维脉冲弹性成像是一个很有前途的技术表征软组织的弹性。它涉及到由低频(50-200赫兹)脉冲横波传播引起的位移的测量。超高速超声成像系统(高达10,000帧/秒)用于跟踪缓慢传播的横波(速度/spl sim/4 m/s)的传播。研制了一种新型振动装置，将线性换能器阵列置于两根固定在电磁振子上的棒之间。利用该装置，我们在成像区域观察到一个线性横波前。此外，新系统允许低频剪切波束形成。反演算法的结果表明，恢复组织模拟材料的弹性分布是可能的。

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Low-frequency shear wave beam forming in time-resolved 2D pulsed elastography

We have shown in the past that time-resolved 2D pulsed elastography is a promising technique for characterizing the elasticity of soft tissues. It involves the measurement of the displacements induced by the propagation of a low-frequency (50-200 Hz) pulsed shear wave. An ultrafast ultrasonic imaging system (up to 10,000 frames/s) is used to follow the propagation of the slowly propagating shear wave (celerity /spl sim/4 m/s). A new vibrating device has been developed in which the linear array of transducers is placed between two rods fixed to electromagnetic vibrators. Using this device we observe a linear shear wave front in the imaging area. Furthermore the new system allows for low-frequency shear wave beam forming. The results of inversion algorithms indicate that it is possible to recover the elasticity distribution in tissue mimicking materials.

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2000 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.00CH37121)

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