Ultrasound m Med. & Biol.. Vol. 6, pp. 195-196 Pertzamon Press Ltd.. 1980. Printed in Great Britain

REPORTS

I E E E G R O U P O N S O N I C S A N D U L T R A S O N I C S

The 1979 Ultrasonics Symposium was held in New Orleans from 26--28 September 1979. The following papers of interest to our readers were presented.

1. Transmitters and receivers for medical ultrasonics. 11. J. CALLERAME, R. H. TANCRELL and D. T. WILSON, Raytheon Research Division, Waltham, Massa- chusetts.

2. Real time speckle reduction in B-mode images. R. ENTREgJtq and H. E. MELTON, 12. Advanced Technology Labs,, Bellevue, Washing- ton.

3. Acoustic microprobe for characterization of in- homogeneous tissue masses. F. E. BARBER, L. S. SLETZINGER and T. J. MONAHAN, Harvard Medical School, Boston, Massachusetts. 13.

4. Integrated ultrasonic baekseatter as an approach to tissue characterization/n vivo. M. O'DONNELL, D. BAUWENS, J. W. MIMBS and J. G. MILLER, Washington University, St. Louis, Missouri.

5. The backseattering of ultrasound by randomly rough surfaces studied by ultrasonic spectroscopy at normal incidence. F. COHEN-T~OUDJt and G. QUENTr~, Universite Paris VII, Paris, France.

6. Digital processing of ultrasonic data by deconvolu- tion. E. HUNDT and E. TRAUTENBERG, Siemens AG, Munchen, Germany.

7. A single channel reduced bandwidth saw based pro- cessor for ultrasound imaging. G. MANES, C. ATZENI and S. GASPERINI, Instituto di Eiettronica, Florence, Italy.

8. An electronically addressed bulk acoustic wave Fourier transform device. B. A. AULD, D. W. PETITBONE, J. D. PLUMMER and R. G. Swartz, Ginzton Lab., Stanford, California.

9. Acoustic microscopy appfied to complex geometry componentg L. W. KESSLER, D. E. YUHAS and T. E. MCGRAW, Sonoscan Inc., Bensenville, Illinois.

10. Photoacoustie microscope. M. LUUKKALA and A. PENTTINEN, University of Helsinki, Finland.

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Performance of scanning acoustic microscope employing concave transducers. N. CHUBACHI, J. KUSHIBIK1, T. SANNOM1YA and Y. IYAMA, Tohoku University, Sendal, Japan.

Scanning acoustic microscope: Interpretation of the acoustic contrast of structures buried inside the object J. ATrAL, G. CAMBON and F. SABAROEDIN,

Universite des Sciences et Techniques due Lan- guedoc, Montpellier-Cedex, France.

Transmission acoustic microscopy for study of de- fects in solid state devices~ C. S. TsAx, J. K. WANG and C C. LEE, Carnegie-Mellon University, Pittsburgh, Pennsyl- vania.

Phase measurement using an amplitude-modulated carrier for transmission acoustic microscopy. C. E. LEE, J. K. WANG and C. S. TSAI, Carnegie-Mellon University, Pittsburgh, Pennsyl- vania.

The measurement of saw dispersion and film thick- ness by acoustic microscopy. R. D. WEGLEIN,

Hughes Research Laboratories, Malibu, Califor- nia.

An automated system for measurement of absorp- lion coefficients using the transient thermoelectric technique. D. W. DUBACIL L. A. FRIZZELL and W. D. O'BRIEN, JR., University of Illinois, Urbana, Illinois.

Fabrication of small diameter thermncouples for use in the transient thermoelectric technique. D. W. DUBACK, L. A. FRIZZELL and W. D. O'BRIEN, JR., University of Illinois, Urbana, Illinois.

Sources of systematic errors in ultrasonic power measurements by radiation force balance tech- niqueg L. L. NIDER and W. D. O'BRIEN, JR., University of Illinois, Urbana, Illinois.

196 Reports

19. C. W. measurement of ultrasound velocity in liquids and small biological tissue specimens. P. S. THmY, C. GARGOtm, G. DROUIN and M. BERTRAND, Ecole Polytechnique, Montreal, Canada.

20. Temperature dependence of the ultrasonic veloci- ties in bone. H. S. YOON and J. L. KATZ,

Rensselaer Polytechnic Institute, Troy, New York.

21. Further studies on the acoustic emission of fresh animal bones. H. S. YOON, B. g. CARACO and J. L. KATZ, Rensselaer Polytechnic Institute, Troy, New York.