Short Time Fourier Analysis and Diffraction Effect in Biological Tissue Characterization

  • Mathias Fink
  • François Hottier
Part of the Acoustical Imaging book series (ACIM, volume 12)

Abstract

This study presents a new method based on short time Fourier analysis giving a local unbiased estimation of the attenuation in biological tissue. Short time Fourier analysis concepts are well adapted to process time echographic signals which are non stationary. The interest of Short Time Fourier Analysis is to give an estimation of the signal spectral composition as a function of time. It will be shown that the time dependence of the spectral centre of gravity allows to deduce easily the frequency dependant attenuation. The near field low pass filtering effect due to diffraction is emphasized. A numerical calibration technique developed for each transducer which corrects these effects is described.Experimental results obtained from tissue like phantom and from in vivo liver tissue are presented.

Keywords

Attenuation Convolution Peaked Phan 

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References

  1. 1.
    R.B. Kuc, Statistical Estimation of the Acoustical Attenuation Slope for Liver Tissue, Ph. D Thesis, Columbia University, 78-2331 (1977).Google Scholar
  2. 2.
    R. Kuc and M. Schwartz, Estimating the Acoustic Attenuation Slope for Liver from Reflected Ultrasound Signals, IEEE Trans. Sonics Ultrasonics vol.SU-26, 353–362, Sept.1979CrossRefGoogle Scholar
  3. 3.
    J. Ophir and N.F. Maklad, A New Stochastic C-Scan Technique for Attenuation Coefficient Measurements in Tissue Equivalent Material, presented at the 23rd Annual Meeting of the American Institute of Ultrasound in Medicine, San Diego, Calif, Oct. 1978.Google Scholar
  4. 4.
    M.O. Donnel, E.T. Jaynes, J.G. Miller, Mechanisms: Relationship between Ultrasonic Attenuation and Dispersion Tissue Characterization Meeting, Gaithersburg 1978.Google Scholar
  5. 5.
    M. Fink, Theoretical Study of Pulsed Echographic Focusing Procedures, Acoustical Imaging vol. 10, 437–453 (1982), Plenum.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Mathias Fink
    • 1
  • François Hottier
    • 1
  1. 1.Laboratoires d’Electronique et de Physique AppliquéeLimeil-BrévannesFrance

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