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Ultrasonic propagation in cortical bone mimics

Ultrasonic propagation in cortical bone mimics
Ultrasonic propagation in cortical bone mimics
Understanding the velocity and attenuation characteristics of ultrasonic waves in cortical bone and bone mimics is important for studies of osteoporosis and fractures. Three complementary approaches have been used to help understand the ultrasound propagation in cortical bone and bone mimics immersed in water, which is used to simulate the surrounding tissue in vivo. The approaches used were Lamb wave propagation analysis, experimental measurement and two-dimensional (2D) finite difference modelling. First, the water loading effects on the free plate Lamb modes in acrylic and human cortical bone plates were examined. This theoretical study revealed that both the S0 and S1 mode velocity curves are significantly changed in acrylic: mode jumping occurs between the S0 and S1 dispersion curves. However, in human cortical bone plates, only the S1 mode curve is significantly altered by water loading, with the S0 mode exhibiting a small deviation from the unloaded curve. The Lamb wave theory predictions for velocity and attenuation were then tested experimentally on acrylic plates using an axial transmission technique. Finally, 2D finite difference numerical simulations of the experimental measurements were performed. The predictions from Lamb wave theory do not correspond to the measured and simulated first arrival signal (FAS) velocity and attenuation results for acrylic and human cortical bone plates obtained using the axial transmission technique, except in very thin plates.
0031-9155
4635-4647
Dodd, S.P.
b05ffaff-aee8-4252-af30-a19f5f222dc5
Cunningham, J.L.
6253f8e6-f747-44d7-8edb-6b0b22467978
Miles, A.W.
822cf30f-f60e-4d63-954b-765eea09b184
Gheduzzi, S.
20fa7aa8-cc04-411d-b569-37e405132d10
Humphrey, V.F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Dodd, S.P.
b05ffaff-aee8-4252-af30-a19f5f222dc5
Cunningham, J.L.
6253f8e6-f747-44d7-8edb-6b0b22467978
Miles, A.W.
822cf30f-f60e-4d63-954b-765eea09b184
Gheduzzi, S.
20fa7aa8-cc04-411d-b569-37e405132d10
Humphrey, V.F.
23c9bd0c-7870-428f-b0dd-5ff158d22590

Dodd, S.P., Cunningham, J.L., Miles, A.W., Gheduzzi, S. and Humphrey, V.F. (2006) Ultrasonic propagation in cortical bone mimics. Physics in Medicine and Biology, 51 (18), 4635-4647. (doi:10.1088/0031-9155/51/18/012).

Record type: Article

Abstract

Understanding the velocity and attenuation characteristics of ultrasonic waves in cortical bone and bone mimics is important for studies of osteoporosis and fractures. Three complementary approaches have been used to help understand the ultrasound propagation in cortical bone and bone mimics immersed in water, which is used to simulate the surrounding tissue in vivo. The approaches used were Lamb wave propagation analysis, experimental measurement and two-dimensional (2D) finite difference modelling. First, the water loading effects on the free plate Lamb modes in acrylic and human cortical bone plates were examined. This theoretical study revealed that both the S0 and S1 mode velocity curves are significantly changed in acrylic: mode jumping occurs between the S0 and S1 dispersion curves. However, in human cortical bone plates, only the S1 mode curve is significantly altered by water loading, with the S0 mode exhibiting a small deviation from the unloaded curve. The Lamb wave theory predictions for velocity and attenuation were then tested experimentally on acrylic plates using an axial transmission technique. Finally, 2D finite difference numerical simulations of the experimental measurements were performed. The predictions from Lamb wave theory do not correspond to the measured and simulated first arrival signal (FAS) velocity and attenuation results for acrylic and human cortical bone plates obtained using the axial transmission technique, except in very thin plates.

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Published date: 21 September 2006

Identifiers

Local EPrints ID: 43404
URI: https://eprints.soton.ac.uk/id/eprint/43404
ISSN: 0031-9155
PURE UUID: fd88074d-cb3a-4aab-9a9f-3270fad8afb0
ORCID for V.F. Humphrey: ORCID iD orcid.org/0000-0002-3580-5373

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Date deposited: 24 Jan 2007
Last modified: 14 Mar 2019 01:44

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Contributors

Author: S.P. Dodd
Author: J.L. Cunningham
Author: A.W. Miles
Author: S. Gheduzzi
Author: V.F. Humphrey ORCID iD

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