Chaboty, Aubin, Nguyen, Vu-Hieu, Haiat, Guillame et Bélanger, Pierre.
2025.
« Estimating the properties of bone phantom cylinders through the inversion of axially transmitted low-frequency ultrasonic guided waves ».
Ultrasonics, vol. 155.
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Résumé
Early detection of osteoporosis has increasingly focused on ultrasonic methods, particularly guided waves in axial transmission to assess cortical bone properties. This study demonstrates the potential of low-frequency measurements (<500 kHz) for accurately inferring cortical mechanical and geometrical properties. A custom ultrasonic transducer centered at 350 kHz was used to acquire data, processed via a 2D fast Fourier transform to obtain dispersion curves. These were compared with simulations generated using the semi-analytical iso- geometric analysis (SAIGA) method, modeling a quasi-cylindrical bone geometry in void or immersed in olive oil. By incorporating an excitability parameter into the inversion algorithm, the proposed method achieved a less than 5% discrepancy between bone phantom properties determined via SAIGA inversion and bulk wave pulse-echo measurements, demonstrating its accuracy and potential for in vivo applications. Results also showed that high-wavenumber modes predominantly reflect material properties, whereas low- wavenumber modes below 100 kHz are sensitive to the overall bone geometry, highlighting the importance of low frequencies for a global bone characterization.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Professeur: | Professeur Bélanger, Pierre |
| Affiliation: | Génie mécanique |
| Date de dépôt: | 30 juill. 2025 13:35 |
| Dernière modification: | 11 août 2025 20:14 |
| URI: | https://espace2.etsmtl.ca/id/eprint/31193 |
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