Three-dimensional finite element modeling of guided ultrasound wave propagation in intact and healing long bones
Φόρτωση...
Ημερομηνία
Συγγραφείς
Protopappas, V. C.
Kourtis, I. C.
Kourtis, L. C.
Malizos, K. N.
Massalas, C. V.
Fotiadis, D. I.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Acoustical Society of America
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Journal of the Acoustical Society of America
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The use of guided waves has recently drawn significant interest in the ultrasonic characterization of bone aiming at supplementing the information provided by traditional velocity measurements. This work presents a three-dimensional finite element study of guided wave propagation in intact and healing bones. A model of the fracture callus was constructed and the healing course was simulated as a three-stage process. The dispersion of guided modes generated by a broadband 1-MHz excitation was represented in the time-frequency domain. Wave propagation in the intact bone model was first investigated and comparisons were then made with a simplified geometry using analytical dispersion curves of the tube modes. Then, the effect of callus consolidation on the propagation characteristics was examined. It was shown that the dispersion of guided waves was significantly influenced by the irregularity and anisotropy of the bone. Also, guided waves were sensitive to material and geometrical changes that take place during healing. Conversely, when the first-arriving signal at the receiver corresponded to a nondispersive lateral wave, its propagation velocity was almost unaffected by the elastic symmetry and geometry of the bone and also could not characterize the callus tissue throughout its thickness. In conclusion, guided waves can enhance the capabilities of ultrasonic evaluation. (c) 2007 Acoustical Society of America.
Περιγραφή
Λέξεις-κλειδιά
arbitrary cross-section, axial transmission, velocity-measurement, tissue properties, cortical bone, lamb waves, fracture, cylinders, feasibility, simulation
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000247410500061
http://link.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JASMAN000121000006003907000001
http://link.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JASMAN000121000006003907000001
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών