Abstract
Measurement of ultrasonic attenuation and velocity of cancellous bone are being applied to aid diagnosis of women with high fracture risk due to osteoporosis (Hans et al., 1996). Ultrasonic measurements in the calcaneus are generally derived using a substitution method, whereby a reference signal is obtained firstly through water alone, and then with the specimen interposed. Velocity measurements are obtained from transit time determinations (usually by detection of the first arrival point, first zero-crossing point or a fixed threshold on the rising front). Phase velocity dispersion in cancellous bone has received little attention up to now. In previous works we have reported a method for characterizing acoustic properties of human cancellous bone using parametric imaging techniques (Laugier et al, 1994). Parametric images of the slope of attenuation coefficient and ultrasonic bone velocity have been compared with bone mass density (BMD) images of the calcaneus (Laugier et al, 1997). The present study was conducted to provide sufficient quantitative information on velocity dispersion of human calcaneus, a preferred site of ultrasonic measurement in clinical practice, so that the relationship between dispersion and BMD could be clarified.
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Droin, P., Laugier, P., Berger, G. (1997). Ultrasonic Attenuation and Dispersion of Cancellous Bone in the Frequency Range 200 Khz-600 Khz. In: Lees, S., Ferrari, L.A. (eds) Acoustical Imaging. Acoustical Imaging, vol 23. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-8588-0_25
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DOI: https://doi.org/10.1007/978-1-4419-8588-0_25
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