Advertisement

A Two Dimensional PVDF Transducer Matrix as a Receiver in an Ultrasonic Transmission Camera

  • B. Granz
  • R. Oppelt
Part of the Acoustical Imaging book series (ACIM, volume 15)

Abstract

A two dimensional ultrasonic receiver matrix with the piezoelectric polymer PVDF has been developed and tested in an ultrasonic transmission camera. The major advantage of this matrix over know receiver devices for ultrasonic cameras is its high sensitivity along with high bandwidth, its large number of small receiver elements and its pure electronic read-out. No mechanical moving of either the image or the receiver array is needed. The matrix read — out is realized by a stack of 29 thin film substrates with 128 switchable preamplifiers each. One side of the stack forms a contact matrix with 29 * 128 metal contacts of the size 0.75 mm * 0.65 mm, covering a total area of 26 mm * 96 mm. The contact matrix is pressed against a common 25 um PVDF foil as a common transducer. A parallel signal procession results in a homogenous image presentation. Transmission image of technical and biological objects with a frame rate of 25 Hz and a sensitivity of 6 * 10−6 V/Pa are sown. The intrinsic resolution of the camera — 1.7 mm at 2 MHz is reproduced in the image.

Keywords

Object Plane Transmission Image Contact Matrix Receiver Element Intrinsic Resolution 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    P.S. Green, L.F. Schaefer, E.D. Jones and J.R. Suarez A New High-Performance Ultrasonic Camera, in “Acoustical Holography”, Vol. 5, Plenum Press, New York, 1973.Google Scholar
  2. 1a.
    H.H. Mathias, H. Woltering and V. Guth Die Ultraschal1transmissionskamera bei der Diagnostik von instabilen dysplastischen und dislozierten Hüftgelenken bei Neugeborenen und Kindern im 1. Lebensjahr, Klinische Pediatrie, 196 (1984)Google Scholar
  3. 2.
    H. Brettel, U. Roeder and C. Scherg Ultrasonic Transmission Camera for Medical Diagnoses, Biomed. Tech., Ergänzungsband, 26, (1981), 63.Google Scholar
  4. 3.
    J.D. Plummer, R.G. Swartz, M.G. Maginnes, J.R. Beaudouin and J.D. Meindl Two-Dimensional Transmit/Receive Ceramic Piezoelectric Arrays: Construction and Performance, IEEE Trans, on Son, and Ultrason., 25, (1978), 273CrossRefGoogle Scholar
  5. 4.
    J.F. Gelly and C. Maerfeld Properties for a 2 D Multiplexed Array for Acoustic Imaging, Proc. of the IEEE Us. Symp. (1981), 685Google Scholar
  6. 5.
    M. Papallardo Hybrid Linear and Matrix Acoustic Arrays, Ultrasonics, 19, (1981), 81CrossRefGoogle Scholar
  7. 6.
    B. Granz A Linear Monolithic Receiving Array of PVDF Transducers for Transmission Cameras, in “Acoustical Imaging”, Vol. 12, Plenum Press, New York, 1982Google Scholar
  8. 7.
    J.W. Goodman “Introduction to Fourier Optics”, Mc Graw Hill, New York, 1968Google Scholar
  9. 8.
    R. Oppelt and H. Ermert Transfer Function Analysis of a Quasioptical Ultrasonic Imaging System, Ultrasonic Imaging, 6, (1984), 324PubMedCrossRefGoogle Scholar
  10. 9.
    R. Oppelt Theoretische und experimentelle Untersuchung zur quasioptischen Abbildung mit einer Ultraschall-Transmissionskamera, Dissertation, Institut für HF-Technik, Universität Erlangen-Nürnberg, 1985Google Scholar

Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • B. Granz
    • 1
  • R. Oppelt
    • 1
  1. 1.Forschungslaboratorien der Siemens AGErlangenGermany

Personalised recommendations