In the application of cancellous bone ultrasound diagnosis based on backscatteringmethod, it is of great importance to estimate fast and accurately whether the valid backscatteringsignal exists in the received signa...
详细信息
In the application of cancellous bone ultrasound diagnosis based on backscatteringmethod, it is of great importance to estimate fast and accurately whether the valid backscatteringsignal exists in the received signal. We propose a fast estimationmethod based on spectrumentropymethod. With 984 records of adult calcaneus clinical data, we estimate the validity of the backscatter signal using this method. The results of the proposed method and the results of experience-base judgement were compared and analyzed. And two key parameters, the signal range length and the segment number of the spectrumentropy, were analyzed. The results show when the signal range length is 13 I^s and the segment number is 15 20, this method can get the best result （accuracy〉95%, sensitivity〉99%, specificity〉87%）, while taking little calculation time （1.5 ms）. Therefore, this spectrumentropymethod can satisfy the accuracy and real-time requirements in the ultrasonicestimation for cancellous bone.
暂无评论