Signal Enhancement for Automatic Identification of Arterial Wall Echoes from an Intravessel Scanner

  • R. W. Martin
  • G. H. Pollack
  • J. B. Phillips
  • D. W. Watkins

Abstract

Techniques for automatic processing of echo information for determining vessel cross sectional area are described. The echo information is obtained from a catheter tip instrumented with a circumferential array of transducer elements. variation in the amplitude of echoes received and frequent appearance of multiple echoes pose wall echo identification problems. Four processing strategies have been implemented to overcome these problems: (1) ensemble integration; (2) adaptive setting of the number of ensemble integrations performed for each transducer scanned; (3) echo video integration; and (4) adaptive threshold crossing detection. Each of these methods has proven useful in overcoming particular problems.

Keywords

Catheter Radar Expense Convolution Summing 

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References

  1. 1.
    Martin, R.W., Pollack, G.H. and Phillips, J.B.: Stroke volume measurement with an ultrasonic catheter tip system, Ultrasound in Medicine, Vol. 3A, Ed. by: White, D. and Brown, R.E., Plenum Publishing Co., N.Y., 23–39 (1977).Google Scholar
  2. 2.
    Martin, R.W., Pollack, G.H. and Phillips, J.: An ultrasonic catheter tip instrument for measuring blood flow. IEEE Ultrasonic Syrnp. Proc. IEEE Cat. #75 CHO 994–450, 13–17, 1975.Google Scholar

Copyright information

© American Institute of Ultrasound in Medicine and Plenum Press, New York 1978

Authors and Affiliations

  • R. W. Martin
    • 1
  • G. H. Pollack
    • 1
  • J. B. Phillips
    • 1
  • D. W. Watkins
    • 1
  1. 1.Department of Anesthesiology and Division of Bioengineering, RN-10University of WashingtonSeattleUSA

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