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dc.contributor.author
 hal.structure.identifier
MORESCHI, Hélène
53727 Imaging, Brain & Neuropsychiatry [iBraiN]
dc.contributor.author
 hal.structure.identifier
CALLE, Samuel
53727 Imaging, Brain & Neuropsychiatry [iBraiN]
dc.contributor.author
 hal.structure.identifier
GUERARD, Sandra
99538 Laboratoire de biomécanique [LBM]
dc.contributor.author
 hal.structure.identifier
MITTON, David
99538 Laboratoire de biomécanique [LBM]
dc.contributor.author
 hal.structure.identifier
RENAUD, Guillaume
53727 Imaging, Brain & Neuropsychiatry [iBraiN]
dc.contributor.author
 hal.structure.identifier
DEFONTAINE, Marielle
53727 Imaging, Brain & Neuropsychiatry [iBraiN]
dc.date.accessioned2013
dc.date.available2013
dc.date.issued2011
dc.date.submitted2013
dc.identifier.issn0954-4119
dc.identifier.urihttp://hdl.handle.net/10985/7117
dc.description.abstractDynamic acousto-elastic testing (DAET) is based on the coupling of a lowfrequency (LF) acoustic wave and high-frequency ultrasound (US) pulses (probing wave). It was developed to measure US viscoelastic and dissipative non-linearity in trabecular bone. It is well known that this complex biphasic medium contains microdamage, even when tissues are healthy. The purpose of the present study was to assess the sensitivity of DAET to monitor microdamage in human calcanei. Three protocols were therefore performed to investigate the regional heterogeneity of the calcaneus, the correlation between DAET measurements and microdamage revealed by histology, and DAET sensitivity to mechanically induced fatigue microdamage. The non-linear elastic parameter b was computed for all these protocols. The study demonstrated the presence of high viscoelastic and dissipative non-linearity only in the region of the calcaneus close to the anterior talocalcaneal articulation (region of high bone density). Protocols 1 and 2 also showed that most unsorted calcanei did not naturally exhibit high non-linearity, which is correlated with a low level of microcracks. Nevertheless, when microdamage was actually present, high levels of US non-linearity were always found, with characteristic non-linear signatures such as hysteresis and tension/compression asymmetry. Finally, protocol 3 demonstrated the high sensitivity of DAET measurement to fatigue-induced microdamage.
dc.description.sponsorshipAgence Nationale pour la Recherche (ANR), France [Grant BONUS_07BLAN0197].
dc.publisherSAGE Publications
dc.rightsPost-print
dc.subjectmat
dc.subjecttrabecular bone
dc.subjectmicrodamage
dc.subjectacousto-elasticity
dc.subjectacoustic non-linearity
dc.subjectviscoelasticity
dc.titleMonitoring trabecular bone microdamage using a dynamic acousto-elastic testing method
dc.identifier.doi10.1243/09544119JEIM846
dc.typdocArticle dans une revue avec comité de lecture
dc.localisationCentre de Paris
dc.subject.halMathématique: Logique
dc.subject.halSciences de l'ingénieur: Mécanique: Biomécanique
dc.subject.halSciences de l'ingénieur: Traitement du signal et de l'image
ensam.audienceInternationale
ensam.page282-295
ensam.journalProceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
ensam.volume225
ensam.issue3
hal.identifierhal-00831771
hal.version1
hal.submission.permittedupdateFiles
hal.statusaccept


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