超声背散射系数在松质骨评价中的应用

Objective Analysis and exploitation the application of ultrasonic backscatter signal and Backscatter Coefficient (BSC) in assessment of cancellous bone. Method A cellular model describing the frequency dependence of ultrasonic scattering from trabecular bone has been presented. Then the relationship between BSC and frequency is obtained from theory and compared with the results of experiment for cancellous bone of bovine tibiae in vitro. Finely, the relationship between BSC and apparent density of cancellous bone is investigated in experimental. Result BSC is a non-linear function of frequency, increasing with frequency. A good agreement was obtained in the averaged BSC of experiment and cellular model. And BSC also increases with increasing apparent density of cancellous bone. Conclusion The backscatter signal has a particularly important action in assess cancellous bone, and BSC can be used to assessment of cancellous bone status.