New Processing Techniques in Ultrasound Imaging Systems

  • G. F. Manes
  • C. Susini
  • P. Tortoli
  • C. Atzeni
Part of the Acoustical Imaging book series (ACIM, volume 10)


Novel techniques are described that allow echo signals from ultrasound imaging systems to be processed at a reduced bandwidth. The basic principle consists in processing the complex envelope of the signal, independently of the carrier frequency. However, rather than at baseband, requiring phase-quadrature channels, processing is performed at i.f. by a single channel.

Even though various techniques are possible, surface-acoustic wave (SAW) transversal structures have been employed for the first time in a number of real-time processors.

Programmable delay-lines are described, exhibiting more than 50 dB dynamic range. Based on independent processing of echo carrier and envelope, a phased-array configuration requiring one single delay-line for all the array channels is introduced.

An Hilbert transformer allowing the exact echo envelope to be obtained is demonstrated, and the design of a real-time programmable inverse filter is described.


Delay Line Quantisation Step Hilbert Transformer Pulse Envelope Inverse Filter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    J.C. Somer, Electronic sector scanning for ultrasonic diagnosis, Ultrasonics, 6: 153 (1968).CrossRefGoogle Scholar
  2. 2.
    O.T. Ramm, and F.L. Thurstone, Cardiac imaging using a phased array ultrasound system, Circulation, LIII; 258 (1976).Google Scholar
  3. 3.
    R.E. McKeighen, and M.P. Buchin, New techniques for dinamfcally variable electronic delays for real time ultrasonic imaging, in “Proc. IEEE Ultrasonics Symposium”, Cat 77CH 1264–1 SU: 250 (1977)Google Scholar
  4. 4.
    G. Manes, S. Gasperini, and C. Atzeni, A novel variable delay system for ultrasound beam steering/focusing, in “Septième colloque sur le traitement du signal et ses applications”, Nice, 103 /1 (1979).Google Scholar
  5. 5.
    G. Manes, C. Atzeni, C. Susini, and J.C. Somer, A new delay technique with application to ultrasound phased-array imaging system, Ultrasonics, 17: 225 (1979).CrossRefGoogle Scholar
  6. 6.
    G. Manes, C. Atzeni, and S. Gasperini, A single-channel reduced-bandwidth SAW-based processor for ultrasound imaging, in “Proc. IEEE ltrasonics Symposium”, Cat 79CH 1482–9 SU: 179 (1979).Google Scholar
  7. 7.
    C. Susini, Focalisation properties of a phased-array ultrasound imaging system based on a new type of delay compensation, Atti della Fondazione G.Ronchi, 3: 335 (1980).Google Scholar
  8. 8.
    “Surface Wave Filters”, H. Matthews, ed., J. Wiley & Sons, New York (1977).Google Scholar
  9. 9.
    G. Manes, and C. Atzeni, Baseband compatible SAW processors, Electron. Lett., 15: 661 (1979).Google Scholar
  10. 10.
    G. Manes, et al., Baseband compatible SAW processors: preliminary experiments, in “Proc. IEEE Ultrasonics Symposium”, Cat 79CH 1482–9 SU: 748 (1979).Google Scholar
  11. 11.
    “Application guide to CMOS multiplying D/A converters”, D.H. Sheingold, ed., Analog Devices, Inc. (1978).Google Scholar
  12. 12.
    A.V. Oppenheim, and R.W. Shafer, in “Digital signal processing,” Prentice Hall, Englewood Cliffs, New Jersey (1975).Google Scholar
  13. 13.
    D. Behar, et al., Use of a programmable filter for inverse filtering, Electron. Lett., 16: 88 (1980).Google Scholar
  14. 14.
    J.M. McCool, and B. Widrow, Principles and applications of adaptive filters, IEE Conf. Publ. 144: 84 (1976).Google Scholar

Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • G. F. Manes
    • 1
    • 2
  • C. Susini
    • 1
    • 2
  • P. Tortoli
    • 1
    • 2
  • C. Atzeni
    • 1
    • 2
  1. 1.Consiglio Nazionale delle RicercheIROEFirenzeItaly
  2. 2.Istituto di ElettronicaUniversità di FirenzeFirenzeItaly

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