Reflected Slow and Fast Wave Attenuation Association with Cancellous Models Porosities and Thicknessess

Assessment of bone condition using ultrasound based on pulse echo (PE) technique is preferred because the usage of single transducer. The objective of this paper is to conduct an experiment using PE technique to examine the correlation of fast and slow wave attenuation with various porosities of polyurethane (PU) foam. The waves are decompose using bandlimited deconvolution methods. It observed that the fast wave required sufficient thickness of solid structure to interact well. Despite suffer interference with unwanted scattered wave, the reflected fast and slow wave which propagates twice through the bone models and have enough interaction with the internal structure may contribute to the moderate and constant correlation coefficient for every thickness (fast wave, $R_{\text{average}}^{2}=0.58$ and slow wave, $R_{\text{average}}^{2}=0.70)$.