... system and the method to detect the early stage of degeneration of human articular cartilage. The signal intensity, considering tissue histology [4] and estimation of the mechanical property ... indicating the speed of sound, the density of amaterial, and the acoustic impedance of a material [4], and presented the Gabor function as the mother wavelet and equations [2]. The signal intensity did ... Graduate School of Medicine, Kyoto University, Kyoto,606-8507, Japan2Department of Orthopaedic Surgery, National Hospital Organization Kyoto Medical Center, Kyoto, 612-8555, Japan3Department...