Proceedings of the Fifteenth International Symposium, July 14–6, 1986

Front Matter....Pages i-xi
A History of Acoustic Imaging....Pages 1-28
Diffraction Tomography with Multiple Scattering....Pages 29-34
Arc Back Projection with an Efficient Computation for Ultrasound Reflection Mode Tomography....Pages 35-45
Passive Imaging Through Media with Distributed Inhomogeneities Using an Extension of the Phase Closure Technique....Pages 47-54
Computation Simplification for High-Speed Acoustical Image Reconstruction....Pages 55-67
A Frequency Diversity Method of Reducing Speckle in Wideband Ultrasound Images....Pages 69-78
Ultrasonic Phase Tomography for Medical Applications....Pages 79-89
Improved Tissue Characterization Using Scattering Images....Pages 91-101
Transient Acoustic Scattering in Dispersive Soft Tissue....Pages 103-108
Estimation of Acoustic Attenuation in Diffuse Liver Disease: Can it be Done with the Zero-Crossing Technique?....Pages 109-116
Calculation of Transient Radiation Fields from Axial Symmetric Sources....Pages 117-126
Pulsed PVDF Transducer Fields — Comparison of Theory and Experiment....Pages 127-134
A New Technique for Characterizing Ultrasonic Transducers in Inhomogeneous Media....Pages 135-145
Development of an Electromagnetic Acoustic Transducer for Inspecting the Wall Thickness of Offshore Risers from the Inside....Pages 147-157
Transducer Array for Ultrasound Holographic B-Scan Imaging....Pages 159-167
Accurate Reconstruction of Flaws in Materials Using a Synthetic Aperture Ultrasonic Imaging System....Pages 169-182
Parametric Approach on Field Propagation....Pages 183-191
Performance of Fast Inverse Scattering Solutions for the Exact Helmholtz Equation Using Multiple Frequencies and Limited Views....Pages 193-201
An ECG-Gated Color Doppler Imaging System for Determination of Coronary Bypass Graft Patency....Pages 203-212
A Two Dimensional PVDF Transducer Matrix as a Receiver in an Ultrasonic Transmission Camera....Pages 213-225
A New Digital Scan Processor for Ultrasonic Imaging....Pages 227-238
A Real-Time Imaging System for Non-Destructive Evaluation....Pages 239-251
Implementation of a Real-Time Ultrasonic Saft System for Inspection of Nuclear Reactor Components....Pages 253-266
Flaw Identification in ALOK Imaging Systems....Pages 267-277
A New Surface Acoustic Wave Imaging Technique....Pages 279-289
Acoustical Imaging Techniques—Theoretical and Experimental Results....Pages 291-298
A Flow Imaging and CW Spectral Analysis System....Pages 299-308
Multidimensional Ultrasonic Heart Imaging....Pages 309-318
Optimal Incident Angles in Scanning Tomographic Microscopy....Pages 319-330
Ultrasonic Reflection Tomography with a Transmitter-Receiver System....Pages 331-340
Speckle in Ultrasound Computerized Reflection Mode Tomography....Pages 341-357
Analysis of Inverse Scattering Solutions from Single Frequency, Combined Transmission and Reflection Data for the Helmholtz and Riccati Exact Wave Equations....Pages 359-369
Attempt to Include Refraction in an Ultrasonic Tomography Algorithm....Pages 371-381
Back-Projection Algorithms for a Computer-Controlled Scanning Laser Acoustic Microscope....Pages 383-392
Directional Acoustic Microscope with Electrical Reference Signals....Pages 393-401
Focal Plane Detection in Acoustical Imaging....Pages 403-410
Progress Toward a Practical 100 MHz Scanning Laser Tomographic Acoustic Microscope....Pages 411-422
Thermoacoustic Imaging using a Laser Probe....Pages 423-429
A High Performance Acoustic Microscope — Technical Aspects and Selected Applications....Pages 431-441
Subsurface Imaging in Acoustic Microscopy....Pages 443-452
Relation between Spatial Frequency Sampling Window and Lateral Resolution in Backward Propagation Acoustical Imaging....Pages 453-459
Applications of Digital Image Enhancement Techniques to the Ultrasonic NDE of Composite Materials....Pages 461-469
Some Problems and Experimental Results of Seismic Shallow Prospecting....Pages 471-479
A Modified Sum Focussing Approach to Ultrasonic Speckle Reduction....Pages 481-486
Dereverberation Techniques....Pages 487-492
Polarity-Sensitive Detection of Pulsed Ultrasound Signals....Pages 493-501
Ultrasonic Defect Visualization in a Metal Block....Pages 503-509
Generalized Holography as an Improved Version of Conventional Acoustical Holography....Pages 511-518
Joint Fourier Transform Cross-Correlation for Liver Echotexture Classification....Pages 519-521
A Two-Element Annular Array of Short Fixed Focal Length for Dynamic Focusing....Pages 523-536
Acoustic Imaging of Solid Objects in Air Using a Small Set of Transducers: III. Experimental Demonstration....Pages 537-546
A Broadband—Holography Imaging System for Nondestructive Evaluation....Pages 547-557
Efficient Acoustical Holography and Phase Imaging with High Resolution at 3.6 MHz Using a Liquid Crystal Convertor....Pages 559-569
NDE in Multilayers: Theory, Computer Simulation and Experiments....Pages 571-583
Synthetic Aperture Sonar for Sub-Bottom Imaging....Pages 585-598
Vertical Seismic Profiling Depth Migration of a Salt Dome Flank — A Summary....Pages 599-601
A Sensor-Efficient Algorithm for Array Processing....Pages 603-613
Acoustical Imaging and Point Processes....Pages 615-633
High-Resolution Acoustical Image Reconstruction Algorithm for Finite-Size Objects: The Cascade Form....Pages 635-646
Underwater Acoustical Holographic Imaging by a Square Array System....Pages 647-657
Imaging the Nearfield of a Submerged-Plate Using Acoustical Holography....Pages 659-673
Back Matter....Pages 675-692