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Acoustoelasticity in cancellous bone
K Apostolopoulos1, E Pappa1, D Deligianni1
1Department of Mechanical Engineering and Aeronautics, Laboratory of Biomechanics and Biomedical Engineering, University of Patras, Rion 26500, Greece apostolkon@gmail.com, kpappa@mech.upatras.gr, deligian@mech.upatras.gr.
The Journal of the Acoustical Society of America
|February 3, 2017
Summary
Ultrasound speed in cancellous bone changes linearly with applied compressive strain. This finding offers new possibilities for nondestructive ultrasonic testing of bone using acoustoelasticity principles.
Area of Science:
- Biomedical Engineering
- Materials Science
- Acoustics
Background:
- Cancellous bone's mechanical properties are crucial for skeletal integrity.
- Ultrasound techniques are promising for non-invasive bone assessment.
Purpose of the Study:
- To investigate the strain-dependence of ultrasound speed and attenuation in cancellous bone.
- To explore the potential of acoustoelasticity for nondestructive bone evaluation.
Main Methods:
- Uniaxial compressive strain was applied to cancellous bone specimens.
- Ultrasound speed and broadband attenuation were measured parallel and perpendicular to the strain.
- Measurements were conducted within the elastic region of the bone.
Main Results:
- Ultrasound speed decreased linearly with increasing compressive strain.
- Broadband ultrasound attenuation changes were not linearly related to strain and varied in sign.
- A significant modulation of ultrasound speed by strain was observed.
Conclusions:
- The linear relationship between ultrasound speed and strain in cancellous bone is a key finding.
- Acoustoelasticity offers a viable approach for nondestructive ultrasonic techniques in bone.
- Further research can refine these methods for clinical applications.
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