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Considerations on Signal-To-Noise Ratio in a Continuous Wave Doppler System Using an Array Transducer

  • T. Mochizuki
  • C. Kasai
Part of the Acoustical Imaging book series (ACIM, volume 17)

Abstract

Phased array systems using ultrasound waves have been widely used to produce cross-sectional images of the heart in recent years. Ultrasonic Doppler techniques also supply useful diagnostic information on blood flow in living organs. In the Doppler technique, continuous wave Doppler (CWD) is used to measure high blood flow velocity quantitatively, and it is very desirable that this CWD function be implemented in phased array systems. There has been some commercial equipment in which the CWD is available, however, it lacked measurement sensitivity.

Keywords

Attenuation Coefficient Sound Pressure Sound Wave Sound Field Array Transducer 
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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References

  1. 1.
    Lord Rayleigh “Theory of Sound”(Dover Publ., New York, 1945) Vol. 2, P. 107Google Scholar
  2. 2.
    Y. Torikai, IECE Technical report on Ultrasound (in Japanese). Nov. 16, 1962Google Scholar
  3. 3.
    J. Saneyoshi, Y. Kikuchi, O. Nomoto, “Technical Handbook on Ultrasound” (Nikkan Kougyo Shinbun), 1968, P. 1415Google Scholar
  4. 4.
    M. Okujima, S. Ohtsuki, Approximation evaluation of beam width of a concave-surface transducer and variable aperture transducer, J.J.M.U., Vol. 5, No. 2, P. 9Google Scholar

Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • T. Mochizuki
    • 1
  • C. Kasai
    • 1
  1. 1.Aloka Co., Ltd.MItaka-shi, TokyoJapan

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