Modeling ultrasound interaction with cancellous bone: investigation on the nature of the two compressional waves

Abstract : Although ultrasound might be useful to assess bone quality, the mechanisms of ultrasound propagation in trabecular bone are still poorly understood. For example the propagation of a short pulse that leads, under some conditions, to two transmitted longitudinal waves, a fast and a slow one, is not well explained yet. The objective of this work is to further investigate the nature of these two longitudinal waves in simplified bone model media. The approach is to determine if the fast wave could result from a guided propagation in the solid matrix, the slow wave being due to the propagation in the surrounding fluid (bone marrow). In this context, we studied the propagation of the coherent waves through simplified and customizable binary structures, obtained by a random addition of scatterers, with characteristic dimensions, material properties and anisotropy similar to those of bone. The benefit of such simplified structures is that ultrasound propagation in the entire medium can be theoretically studied from the properties of a single scatterer.
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Fabien Meziere, Marie Muller, Emmanuel Bossy, Arnaud Derode. Modeling ultrasound interaction with cancellous bone: investigation on the nature of the two compressional waves. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810814⟩

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