Department of Physics, Kangwon National University, Chuncheon 200-701, Republic of Korea
J Acoust Soc Am. 2012 Jan;131(1):EL67-73. doi: 10.1121/1.3671064.
The frequency-dependent attenuation and backscatter coefficients were measured in 25 bovine femoral trabecular bone samples from 0.2 to 1.2 MHz. When the average attenuation coefficient was fitted to a nonlinear power law α(f)=α(0)+α(1)f(n), the exponent n was found to be 1.65. In contrast, the average backscatter coefficient was fitted to a power law η(f)=η(1)f(n) and the exponent n was measured as 3.25. The apparent bone density was significantly correlated with the parameter α(1) (0.2-0.7 MHz: r = 0.852, 0.6-1.2 MHz: r = 0.832) as well as the backscatter coefficient (0.5 MHz: r = 0.751, 1.0 MHz: r = 0.808).
在 0.2 至 1.2MHz 的频率范围内，对 25 个牛股骨小梁骨样本的频率相关衰减和反向散射系数进行了测量。当将平均衰减系数拟合到非线性幂律α(f)=α(0)+α(1)f(n)时，发现指数 n 为 1.65。相比之下，平均反向散射系数拟合到幂律η(f)=η(1)f(n)，指数 n 测量为 3.25。表观骨密度与参数α(1)（0.2-0.7MHz：r=0.852，0.6-1.2MHz：r=0.832）以及反向散射系数（0.5MHz：r=0.751，1.0MHz：r=0.808）均具有显著相关性。
