The phase velocity and the backscatter coefficient were measured in 28 bovine femoral trabecular bone samples filled with marrow and water from 0.2 to 0.6 MHz. The phase velocities decreased approximately linearly with increasing frequency and the average dispersion rate of -34 msMHz in the marrow-filled samples was higher than that of -42 msMHz in the water-filled samples. The backscatter coefficients exhibited nonlinear, monotonically increasing dependences on the frequency and the average value of the exponent = 2.92 (frequency dependence) in the marrow-filled samples was higher than the value of = 2.79 in the water-filled samples.
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| http://dx.doi.org/10.1121/1.5077019 | DOI Listing |
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