Effect of Pore Fluid on Piezoelectric Signal in Cancellous Bone Generated by Ultrasound Irradiation
Effect of Pore Fluid on Piezoelectric Signal in Cancellous Bone Generated by Ultrasound Irradiation
复制标题
孔隙流体对超声辐照松质骨压电信号的影响
DOI：
10.1109/laus53676.2021.9639095
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Hosokawa Atsushi
中科院分区：
文献类型：
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作者：
Tsujii Shigehiro;Serada Satoshi;Fujimoto Minoru;Uemura Sunao;Namikawa Tsutomu;Nomura Taisei;Murakami Ichiro;Hanazaki Kazuhiro;Naka Tetsuji;Hosokawa Atsushi
通过实验和数值模拟，研究了超声在牛松质骨中产生的1 MHz压电信号的孔隙流体效应。使用“压电单元（PE单元）”执行实验观察，所述压电单元是采用松质骨样本作为压电元件的超声接收器。采用压电时域有限差分法（PE-FDTD）进行数值模拟，该方法是一种基于压电本构方程的弹性FDTD方法。利用松质骨标本的X线显微CT图像重建骨模型。实验结果表明，在水饱和状态下松质骨中的压电信号幅值比在空气饱和状态下的幅值要小。当假设压电信号不是从骨小梁单元和孔隙流体之间的界面产生时，数值结果表明，在水饱和的松质骨中压电信号幅值较大，这与实验结果相似。
Piezoelectric signals at 1 MHz generated in bovine cancellous bone by ultrasound waves were experimentally and numerically observe to investigate the effect of the pore fluid. The experimental observation was executed using a “piezoelectric cell (PE-cell)” which is an ultrasound receiver adopting a cancellous bone specimen as the piezoelectric element. The numerical observation was executed using a piezoelectric finite-difference time-domain (PE-FDTD) method, which is an elastic FDTD method with piezoelectric constitutive equations. The X-ray microcomputed tomographic image of the cancellous bone specimen was used to reconstruct the bone model. The experimental results showed that the piezoelectric signal amplitude in the water-saturated cancellous bone was leger than the amplitude in the air-saturated bone. When the piezoelectric signal was assumed to be not generated from the interface between the trabecular element and the pore fluid, the numerical results showed that the piezoelectric signal amplitude in the water-saturated cancellous bone was larger, which was similar to the experimental results.