Effect of Boundary Condition on the Two-Wave Propagation in Cancellous Bone

• Katsunori Mizuno

• Keisuke Yamashita

• Yoshiki Nagatani

• Mami Matsukawa

抄録

The two-wave phenomenon in a cancellous bone surrounded by a cortical bone was investigated using the specimens obtained from large mammals. Measurements were performed using laboratory-built poly(vinylidene fluoride) (PVDF) transducers excited by a one-cycle sinusoidal wave at 1 MHz. In addition to the experimental ultrasonic measurements, the finite-difference time-domain (FDTD) simulation was performed using the X-ray micro computed tomography (micro-CT) images (resolution: 48 µm) of the specimens. The clear separation of fast and slow waves was not seen in a specimen where the boundary of the cancellous and cortical bones was ambiguous. On the other hand, the clear separation of fast and slow waves was observed in a specimen where the boundary of cancellous and cortical bones was clear. These results indicate that the boundary characteristics between the cancellous and cortical bones strongly affect the two wave phenomenon. We should pay attention to this point in the case of in vivo assessment using this phenomenon.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 50 (7S), 07HF19-, 2011-07-01

  IOP Publishing

キーワード

• General Physics and Astronomy
• General Engineering

詳細情報

• CRID: 1360284921833114112
• NII論文ID: 210000070968
• DOI: 10.1143/jjap.50.07hf19
• ISSN: 13474065
• ISSN: 00214922
• ISSN: http://id.crossref.org/issn/13474065
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.50.07HF19
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.50.07HF19/pdf
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