Institute of Fundamental Technological Research
Polish Academy of Sciences

Partners

H. Aygün

Southampton Solent University (GB)

Recent publications
1.  Aygün H., Attenborough K., Postema M., A review of the state of art in applying Biot theory to acoustic propagation through the bone, Open Access Library Journal, ISSN: 2333-9705, DOI: 10.4236/oalib.1100994, Vol.e994, pp.1-12, 2014

Abstract:
Understanding the propagation of acoustic waves through a liquid-perfused porous solid frame- work such as cancellous bone is an important pre-requisite to improve the diagnosis of osteoporosis by ultrasound. In order to elucidate the propagation dependence upon the material and structural properties of cancellous bone, several theoretical models have been considered to date, with Biot-based models demonstrating the greatest potential. This paper describes the fundamental basis of these models and reviews their performance.

Keywords:
Acoustic, Propagation, Bone, Theoretical Model

Affiliations:
Aygün H. - Southampton Solent University (GB)
Attenborough K. - The Open University (GB)
Postema M. - other affiliation
2.  Aygün H., Attenborough K., Postema M., Lauriks W., Langton Ch.M., Predictions of angle dependent tortuosity and elasticity effects on sound propagation in cancellous bone, JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, ISSN: 0001-4966, DOI: 10.1121/1.3242358, Vol.126, No.6, pp.3286-3290, 2009

Abstract:
The anisotropic pore structure and elasticity of cancellous bone cause wave speeds and attenuation in cancellous bone to vary with angle. Previously published predictions of the variation in wave speed with angle are reviewed. Predictions that allow tortuosity to be angle dependent but assume isotropic elasticity compare well with available data on wave speeds at large angles but less well for small angles near the normal to the trabeculae. Claims for predictions that only include angle-dependence in elasticity are found to be misleading. Audio-frequency data obtained at audio-frequencies in air-filled bone replicas are used to derive an empirical expression for the angle-and porosity-dependence of tortuosity. Predictions that allow for either angle dependent tortuosity or angle dependent elasticity or both are compared with existing data for all angles and porosities.

Affiliations:
Aygün H. - Southampton Solent University (GB)
Attenborough K. - The Open University (GB)
Postema M. - other affiliation
Lauriks W. - other affiliation
Langton Ch.M. - other affiliation

Category A Plus

IPPT PAN

logo ippt            Pawińskiego 5B, 02-106 Warsaw
  +48 22 826 12 81 (central)
  +48 22 826 98 15
 

Find Us

mapka
© Institute of Fundamental Technological Research Polish Academy of Sciences 2024