Needle shear wave driver for magnetic resonance elastography
Needle shear wave driver for magnetic resonance elastography
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DOI：
10.1002/mrm.20856
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发表时间：
2006-05-01
影响因子：
3.3
通讯作者：
Yang, ES
中科院分区：
文献类型：
--
作者：
Chan, QCC;Li, G;Yang, ES
磁共振弹性成像（MRE）能够定量描述活体组织的力学特性。与组织表面的机械激励相反，本研究中提出的方法描述了由插入的针产生的剪切波。结果表明，使用针驱动器进行的MRE提供的剪切刚度估计值与使用机械测试获得的剪切刚度估计值具有良好的相关性。使用表面和针驱动器获得的MRE采集之间的比较一般产生了相似的结果。然而，由针驱动器在目标区域中提供的明确限定的波传播图案可以减少在2D MRE采集中与表面驱动器一起发生的波长估计中的截面取向相关的误差。在动物身上进行了器械的初步测试。本研究表明，针驱动器是一种有效的选择，与表面驱动器相比具有优势，可在针可触及的目标区域获得准确的刚度估计。
Magnetic resonance elastography (MRE) is capable of quantitatively depicting the mechanical properties of tissues in vivo. In contrast to mechanical excitation at the surface of the tissue, the method proposed in this study describes shear waves produced by an inserted needle. The results demonstrate that MRE performed with the needle driver provides shear stiffness estimates that correlate well with those obtained using mechanical testing. Comparisons between MRE acquisitions obtained with surface and needle drivers yielded similar results in genera. However, the well-defined wave propagation pattern provide by the needle driver in a target region can reduce section orientation-related error in wavelength estimation that occurs with surface drivers in 2D MRE acquisitions. Preliminary testing of the device was performed on animals. This study demonstrates that the needle driver is an effective option that offers advantages over surface drivers for obtaining accurate stiffness estimates in targeted regions that are accessible by the needle.