微结构参数对模仿皮层骨的多孔结构中明显吸收系数的影响
Yasamin Karbalaeisadegh1, Omid Yousefian1, Marie Muller1
1Mechanical and Aerospace Engineering Department, North Carolina State University, Raleigh, NC 27695-8212, USA.
IEEE International Ultrasonics Symposium : [proceedings]. IEEE International Ultrasonics Symposium
|August 2, 2024
概括
骨中的超声波衰减是由散射和吸收引起的. 这项研究量化了明显的吸收,揭示了它对孔隙性和散射水平的依赖,这对于理解孔隙介质中的波传播至关重要.
科学领域:
- 生物医学工程 生物医学工程
- 声学 声学 在声学方面
- 材料科学 材料科学 材料科学
背景情况:
- 超声波在皮质骨等多孔介质中的传播导致能量损失和衰减.
- 减弱的结果是分散和吸收,受微观结构和频率的影响.
研究的目的:
- 在多孔皮层骨结构中模拟和计算超声波衰减.
- 为了隔离散射和吸收对总衰减的影响.
- 定义和分析"明显的吸收".
主要方法:
- 在模拟皮质骨的多孔结构中模拟超声波传播.
- 计算的总衰减,散射衰减和明显吸收.
- 在5MHz和8MHz时有不同的孔径和密度.
主要成果:
- 散射和吸收都对总超声波衰减有显著的贡献.
- 表面吸收受孔隙性的影响,可能是由于多重散射.
- 在高散射模式下,孔径大小/密度通过散射增加了总衰减,而不是明显的吸收.
结论:
- 表面吸收是理解多孔骨中的超声衰减的一个关键参数.
- 散射,吸收和微观结构之间的相互作用决定了波浪能量损失.
- 结果提供了对骨特性超声波表征的见解.
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