Feasibility of bone assessment with leaky Lamb waves in bone phantoms and a bovine tibia
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- K. I. Lee
- Acoustics Research Laboratory and BK21 Physics Research Division, Department of Physics, SungKyunKwan University, Suwon 440-746, Republic of Korea
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- Suk Wang Yoon
- Acoustics Research Laboratory and BK21 Physics Research Division, Department of Physics, SungKyunKwan University, Suwon 440-746, Republic of Korea
書誌事項
- 公開日
- 2004-06-01
- DOI
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- 10.1121/1.1707086
- 公開者
- Acoustical Society of America (ASA)
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説明
<jats:p>In this study, the effect of cortical thickness variation on the propagation of leaky Lamb waves is investigated by using an axial transmission technique commonly used to characterize long bones. Three Lucite™ plates with thicknesses of 1, 3, and 5 mm as bone phantoms and one bovine tibia with a cortical thickness of 2 mm were used at various low frequencies. Experimental measurements in bone phantoms show that the peak frequency and amplitude of excited Lamb modes strongly depend on the thickness of the Lucite plate. In the bovine tibia, the S0 and A0 Lamb modes are consistently observed in the frequency-thickness region from 0.2 to 1.0 MHz mm, and can be effectively launched at a frequency of 200 kHz, suggesting 200 kHz to be the optimal signal frequency for in vivo clinical applications. It can be also seen that both modes are affected by the frequency-thickness product, but the effect is greater for the A0 mode. Hence, the A0 Lamb mode seems more sensitive to cortical thickness change due to aging and osteoporosis. This study suggests that the use of leaky Lamb waves is feasible for ultrasonic bone assessment.</jats:p>
収録刊行物
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- The Journal of the Acoustical Society of America
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The Journal of the Acoustical Society of America 115 (6), 3210-3217, 2004-06-01
Acoustical Society of America (ASA)
