Acoustical Imaging

This volume contains forty-six of the papers presented at the Ninth International Symposium on Acoustical Imaging held December 3-6 1979 in Houston Texas. The theme of the confer- ence was the integration of applications technology. The major objective of the conference was to promote interaction among researchers working on different applications of acoustical imaging. In addition to serving as a state-of-the-art research ref- erence this volume includes six tutorial review papers. For convenience all the papers are grouped under the following headings: methods transducers processing and display phased array considerations acoustic microscopy/non-destructive evalu- ation reconstructive tomography and inversion techniques tissue characterization and impediography nedica1 applications under- water applications and seismic applications. The editor would like to thank the authors and the confer- ence participants. The editor would also like to express his appreciation for the assistance in evaluating the abstracts from the following members of the Program Committee: Mahfuz Ahmed University of California Irvine l:1edica1 Center; Pierre A1ais Paris University France; C. B. Burckhardt Hoffman-Laroche Basel Switzerland; B. P. Hildebrand Spectron Development Labora- tories Inc. Costa Mesa California; Larry W. Kessler Sonoscan Inc. Bensenville Illinois; Rolf Uue11er University of Hinnesota l1inneapo1is Uinnesota; John P. Powers Naval Post Graduate School J:1onterey California; Jerry L. Sutton Naval Ocean Systems Center San Diego California; F. L. Thurstone Duke University Durham North Carolina; Robert C. Waag University of Rochester Rochester New York; and Glen Wade University of California Santa Barbara California.