Improved Imaging with a Wide Band Array

  • S. W. Smith
  • O. T. von Ramm

Abstract

Real time near field ultrasound imaging of soft tissues with linear phased arrays is subject to a variety of problems. These include 1) Image ambiguities which result from the finite sampling of the aperture and limiti. effective dynamic range; 2) Coherent speckle in the image; 3) The wavelength dependence of some reflectors. A substantial reduction in the effect of these problems on image quality may be achieved by the use of transducer arrays with wider bandwidths. Towards this end, a broadband linear array transducer was designed and constructed. This transducer overcomes the usual compromise between sensitivity and bandwidth typical of mechanically damped transducers, by using arrays of differing frequencies.

Keywords

Smit Line Source 

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References

  1. 1.
    von Ramm, O.T., and Thurstone, F.L. “Cardiac Imaging Using a Phased Array Ultrasound System I: System Design” Circulation 53: February, 1976.Google Scholar
  2. 2.
    von Ramm, O.T., Smith, S.W., and Thurstone, F.L. “Gray Scale Imaging With Complex TGC and Transducer Arrays,” Proceedings of the Society of Photo-Optical Instrumentation Engineers, Medicine IV. Gray and Hendee, eds., 1976, pp. 266–270.Google Scholar
  3. 3.
    Reid, J.M. “Challenges and Opportunities in Ultrasound,” Proceedings of Ultrasonic Tissue Characterization Seminar, Melvin Linzer, ed., 1976, pp. 11–17.Google Scholar

Copyright information

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

Authors and Affiliations

  • S. W. Smith
    • 1
  • O. T. von Ramm
    • 2
  1. 1.Food and Drug AdministrationBureau of Radiological HealthRockvilleUSA
  2. 2.Departments of Biomedical Engineering and MedicineDuke UniversityDurhamUSA

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