Faculty Collaboration Database

Acoustic Emission Signatures During Failure of Vertebra and Long Bone. Ann Biomed Eng 2017 Jun;45(6):1520-1533

Date

03/16/2017

Pubmed ID

28293752

DOI

10.1007/s10439-017-1818-4

Scopus ID

2-s2.0-85015211599 (requires institutional sign-in at Scopus site)   10 Citations

Abstract

Clinical classification of an injury has traditionally involved medical imaging, patient history, and physical examination. The pathogenesis or process of injury has been viewed as a crucial component to estimating fracture stability and direct treatment. However, injury classification systems generally exclude pathogenesis and injury mechanisms because these components are often difficult to elucidate. Furthermore, the development of bone damage relative to the mechanical response is difficult to quantify, which limits the ability to define injury and develop injury criteria. Past advents of new knowledge about the mechanisms and progression of fracture have refined safety standards and engineering design for limiting injury. Post-hoc methodologies for identifying and classifying injuries for post-mortem human surrogate (PMHS) research are well established. Though bone fractures can be classified post hoc, questions remain. Surface acoustic sensing (SAS) is an effective approach to augment PMHS experimentation. The objective was to develop and validate an acoustic-emission-based method to characterize bone fractures during injurious loading conditions using acoustic emissions (AEs) in two bone types: vertebral body (VB) and long bone (LB). The newly developed method incorporated the Stockwell transform to estimate the relative energy release rate (RERR) from bone fracture using acoustic signal processing. Fractures were characterized through AE burst durations and frequency content. Results indicated that VB fractures from compression are prolonged processes compared to LB fracture, which was staccato in nature. Significant (p < 0.01) differences between burst duration and frequency content were identified between the two bone types.

Author List

Goodwin BD, Pintar FA, Yoganandan N

Authors

Frank A. Pintar PhD Chair, Professor in the Biomedical Engineering department at Medical College of Wisconsin
Narayan Yoganandan PhD Professor in the Neurosurgery department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Acoustics
Adolescent
Adult
Aged
Biomechanical Phenomena
Female
Humans
Male
Middle Aged
Radius Fractures
Signal Processing, Computer-Assisted
Spinal Fractures
Ulna Fractures
Young Adult