基于反向滤波器的倒谱法估计平均骨小梁间距

Mean trabecular spacing (MTS) is one of the most important parameters to estimate the microstructure of cancellous bone, and estimating the MTS from ultrasonic backscattering signal has its particular advantage. The improved cepstrum method based on an inverse filter is present in this paper. Simulation ultrasonic backscattered signals are used to test the performance of the proposed method. Some experiments are made on human cancellous bone specimens in vitro and the results of MTS estimation are compared between the proposed technique and traditional cepstrum method. It is indicated that the improved cepstrum method has more robustness to the variety of MTS, diffuse scattering and noise.