Measurement of airborne ultrasonic slow waves in calcaneal cancellous bone

Measurements of an airborne ultrasonic wave were made in defatted cancellous bone from the human calcaneus using standard ultrasonic equipment. The wave propagating under these conditions was consistent with a decoupled Biot slow wave travelling in the air alone, as previously reported in gas-satura...

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Bibliographic Details
Published in:Medical engineering & physics 1999-05, Vol.21 (4), p.215-223
Main Authors: Strelitzki, R., Paech, V., Nicholson, P.H.F.
Format: Article
Language:English
Subjects:
Adult
Air
Air-saturated
Attenuation
Biological and medical sciences
Biophysical Phenomena
Biophysics
Bone
Cadaver
Calcaneus - diagnostic imaging
Cancellous bone
Fourier Analysis
Humans
Investigative techniques, diagnostic techniques (general aspects)
Joints
Medical sciences
Os calcis
Reproducibility of Results
Slow wave
Tortuosity
Transducers
Ultrasonic equipment
Ultrasonic investigative techniques
Ultrasonic transmission
Ultrasonic velocity measurement
Ultrasonography - instrumentation
Ultrasonography - methods
Ultrasonography - statistics & numerical data
Ultrasound
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Summary:Measurements of an airborne ultrasonic wave were made in defatted cancellous bone from the human calcaneus using standard ultrasonic equipment. The wave propagating under these conditions was consistent with a decoupled Biot slow wave travelling in the air alone, as previously reported in gas-saturated foams. Reproducible measurements of phase velocity and attenuation coefficient were possible, and an estimate of the tortuosity of the trabecular framework was derived from the high frequency limit of the phase velocity. Thus the method offers a new approach to the acoustic characterisation of bone in vitro which, in contrast to existing techniques, has the potential to yield information directly characterising the trabecular structure.
ISSN:1350-4533
1873-4030
DOI:10.1016/S1350-4533(99)00048-X