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Demonstrates strong correlation between ultrasonic wave velocity and bone mineral density in racehorses, indicating its diagnostic potential.
The axial distribution of longitudinal wave velocity in the cortical bone of a third metatarsal of a racehorse was experimentally investigated using a MHz-range ultrasonic pulse technique. Pronounced heterogeneity in longitudinal wave velocity was observed within the axial cross-section of the midshaft specimen. In dense areas, a near-linear relationship between wave velocity and attenuation was found (R = 0.68, p < 0.001), likely reflecting intrinsic properties of the bone matrix. Site-matched measurements of wave velocity and bone mineral density (BMD), obtained via X-ray computed tomography, revealed a strong correlation, indicating that BMD is a primary determinant of ultrasonic wave velocity. This correlation exceeded that observed between velocity and hydroxyapatite (HAp) crystallite orientation, measured by 2θ–ω scans of X-ray diffraction. These findings show the diagnostic potential of ultrasound for the evaluation of bone quality, offering a non-invasive and sensitive approach to assess the cortical bone.
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Kodama et al. (2025) studied this question.
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