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http://dx.doi.org/10.7776/ASK.2011.30.3.158

Dependencies of Group Velocity and Attenuation Coefficient on Structural Properties in Copper and Nickel Foams with an Open-Celled Structure as Trabecular-Bone-Mimicking Phantoms  

Kim, Seong-Il (강원대학교 물리학과)
Lee, Kang-Il (강원대학교 물리학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.30, no.3, 2011 , pp. 158-166 More about this Journal
Abstract
In the present study, copper and nickel foams with an open-celled structure as trabecular-bone-mimicking phantoms were used to investigate the dependencies of group velocity and attenuation coefficient on structural properties such as trabecular thickness (Tb.Th) and trabecular separation (Tb.Sp) in trabecular bone. The group velocity and attenuation coefficient of the copper and nickel foams were measured by a through-transmission method in water, using a pair of broadband, unfocused transducers with a diameter of 12.7 mm and a center frequency of 1.0 MHz. The separation of the Biot's fast and slow waves was consistently observed in the ultrasonic signals transmitted through the copper and nickel foams. The group velocities of the copper and nickel foams showed highly positive correlations with Tb.Th and Tb.Sp. The attenuation coefficient of the copper foam showed a highly negative correlation with Tb.Th and Tb.Sp, whereas that of the nickle foam showed a highly positive correlation with Tb.Th and Tb.Sp. These results advance our understanding of those previously reported by other researchers using trabecular bone samples or phantoms.
Keywords
Osteoporosis; Trabecular-Bone-Mimicking Phantom; Bone Microarchitecture; Quantitative Ultrasound; Group Velocity; Attenuation Coefficient;
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Times Cited By KSCI : 2  (Citation Analysis)
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