Measurement of Wave Velocity in Bovine Bone Tissue by Micro-Brillouin Scattering

概要

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To evaluate microscopic bone elasticity without contribution from macroscopic structures, a micro-Brillouin scattering technique was used. Our micro-Brillouin scattering system enables the measurement of wave velocities in the GHz range over a minute area (diameter: approximately 10 μm). We have applied this technique to thinly sliced bovine trabecular bone and collagen film. The average wave velocity in one trabecula was approximately $4.8 \times 10^{3}$ m/s, which was much higher than the velocity in the collagen film. The velocity anisotropy near the trabecular nodes was weak but complicated. In addition, these velocities were also higher than velocities in the cortical bone, which were in the MHz range. These investigations show the possibility of using the Brillouin scattering technique to evaluate microscopic bone elasticity, which is closely related to the quality of bone matrix.
2008-05-25