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Ultrasound transmission loss across transverse and oblique bone fractures: an in vitro study

Ultrasound transmission loss across transverse and oblique bone fractures: an in vitro study
Ultrasound transmission loss across transverse and oblique bone fractures: an in vitro study
An axial transmission technique has been used to investigate the changes in the first arrival time and signal amplitude of 200 kHz ultrasonic waves travelling across different fracture geometries. Results taken from intact bovine femora were compared with those produced when a transverse and an oblique fracture were simulated. The arrival time and signal amplitude displayed a different variation with receiver position for the two geometries and a given fracture gap width. A comparison between this work and a previous study suggested that the marrow does not play a significant role in the mechanisms causing the change in arrival time and signal amplitude. Numerical modelling revealed that an oblique fracture caused a reduction in the extra time delay of the propagating wave compared with the transverse case, but a decrease in the corresponding signal amplitude, i.e., greater signal loss. The angle of the oblique fracture was investigated and results suggested that decreasing the fracture angle relative to the wave propagation direction caused a decrease in the extra time delay and an increase in signal loss. These findings are important for determining the sensitivity of systems for monitoring fracture healing using ultrasound arrival time and signal amplitude. (E-mail: spd@inorbit.com)
axial transmission, cortical bone, mimics, amplitude, simulation, fracture monitoring
0301-5629
454-462
Dodd, Simon P.
fed98356-0b31-454c-9025-676073ef3963
Cunningham, James L.
8f28df94-78c9-439b-9253-a09ed24a7e01
Miles, Anthony W.
ce7c3385-3306-40b7-bf47-27dcef5e7d24
Gheduzzi, Sabina
b03b8ba7-7c1c-4c29-84d0-98fc73cfab67
Humphrey, Victor F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Dodd, Simon P.
fed98356-0b31-454c-9025-676073ef3963
Cunningham, James L.
8f28df94-78c9-439b-9253-a09ed24a7e01
Miles, Anthony W.
ce7c3385-3306-40b7-bf47-27dcef5e7d24
Gheduzzi, Sabina
b03b8ba7-7c1c-4c29-84d0-98fc73cfab67
Humphrey, Victor F.
23c9bd0c-7870-428f-b0dd-5ff158d22590

Dodd, Simon P., Cunningham, James L., Miles, Anthony W., Gheduzzi, Sabina and Humphrey, Victor F. (2008) Ultrasound transmission loss across transverse and oblique bone fractures: an in vitro study. Ultrasound in Medicine & Biology, 34 (3), 454-462. (doi:10.1016/j.ultrasmedbio.2007.09.002). (PMID:17993245)

Record type: Article

Abstract

An axial transmission technique has been used to investigate the changes in the first arrival time and signal amplitude of 200 kHz ultrasonic waves travelling across different fracture geometries. Results taken from intact bovine femora were compared with those produced when a transverse and an oblique fracture were simulated. The arrival time and signal amplitude displayed a different variation with receiver position for the two geometries and a given fracture gap width. A comparison between this work and a previous study suggested that the marrow does not play a significant role in the mechanisms causing the change in arrival time and signal amplitude. Numerical modelling revealed that an oblique fracture caused a reduction in the extra time delay of the propagating wave compared with the transverse case, but a decrease in the corresponding signal amplitude, i.e., greater signal loss. The angle of the oblique fracture was investigated and results suggested that decreasing the fracture angle relative to the wave propagation direction caused a decrease in the extra time delay and an increase in signal loss. These findings are important for determining the sensitivity of systems for monitoring fracture healing using ultrasound arrival time and signal amplitude. (E-mail: spd@inorbit.com)

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More information

Submitted date: 31 May 2007
Published date: March 2008
Keywords: axial transmission, cortical bone, mimics, amplitude, simulation, fracture monitoring

Identifiers

Local EPrints ID: 51026
URI: https://eprints.soton.ac.uk/id/eprint/51026
ISSN: 0301-5629
PURE UUID: 3d73c706-6177-4b89-855c-eaf10a86033a
ORCID for Victor F. Humphrey: ORCID iD orcid.org/0000-0002-3580-5373

Catalogue record

Date deposited: 01 May 2008
Last modified: 20 Jul 2019 01:00

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