title: Ultrasound Speed of Sound Measurements in Trabecular Bone Using the Echographic Response of a Metallic Pin.
abstract: Bone quality is an important parameter in spine surgery, but its clinical assessment remains difficult. The aim of the work described here was to demonstrate in vitro the feasibility of employing quantitative ultrasound to retrieve bone mechanical properties using an echographic technique taking advantage of the presence of a metallic pin inserted in bone tissue. A metallic pin was inserted in bone tissue perpendicular to the transducer axis. The echographic response of the bone sample was determined, and the echo of the pin inserted in bone tissue and water were compared to determine speed of sound, which was compared with bone volume fraction. A 2-D finite-element model was developed to assess the effect of positioning errors. There was a significant correlation between speed of sound and bone volume fraction (R(2) = 0.6). The numerical results indicate the relative robustness of the measurement method, which could be useful to estimate bone quality intra-operatively.
authors: CNRS, Laboratoire Modélisation et Simulation MultiEchelle, MSME UMR CNRS 8208, Créteil, France.
authors: Séraphin
authors: S
authors: Guipieri
authors: CNRS, Laboratoire Modélisation et Simulation MultiEchelle, MSME UMR CNRS 8208, Créteil, France; Kobe City College of Technology, Nishiku, Kobe, Japan.
authors: Yoshiki
authors: Y
authors: Nagatani
authors: Service de Chirurgie Plastique et Reconstructive, Hôpital Henri Mondor AP-HP, F-94000, Créteil, France.
authors: Romain
authors: R
authors: Bosc
authors: CNRS, Laboratoire Modélisation et Simulation MultiEchelle, MSME UMR CNRS 8208, Créteil, France.
authors: Vu-Hieu
authors: VH
authors: Nguyen
authors: CNRS, B2 OA (CNRS UMR 7052), Paris, France.
authors: Christine
authors: C
authors: Chappard
authors: CNRS, Laboratoire Modélisation et Simulation MultiEchelle, MSME UMR CNRS 8208, Créteil, France.
authors: Didier
authors: D
authors: Geiger
authors: CNRS, Laboratoire Modélisation et Simulation MultiEchelle, MSME UMR CNRS 8208, Créteil, France. Electronic address: guillaume.haiat@univ-paris-est.fr.
authors: Guillaume
authors: G
authors: Haïat
mesh_terms: D000818:Animals; D001858:Bone Nails; D002417:Cattle; D005269:Femur / Q000000981:diagnostic imaging*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008962:Models, Theoretical; D014465:Ultrasonics / Q000379:methods*; D014463:Ultrasonography
keywords: Biomechanics; Quantitative ultrasound; Speed of sound; Trabecular bone