The 17th International Symposium on Acoustical Imaging was held at Tohoku University, Sendai, Japan, during May 31-June 2, 1988. The symposium was organized by the ultrasonics research group of Tohoku University and the IEEE ijFFC Society, Tokyo Chapter. Of the 128 papers submitted, 88 were presented during the symposium, which comprised 144 researchers from 13 countries. This volume contains 81 papers as the record of the symposium and is clas sified into the following sections: (1) Acoustic Microscopy and its Applications; (2) Non-Destructive Evaluation; (3) Signal Processing of Images; (4) Acoustic Measurements and Physical Acoustics; (5) Medical Ultrasonic Diagnostics; (6) Acoustic Sensors; (7) Acoustic Holography and Tomography; (8) Seismic Exploration; and (9) Imaging Instrumentation and Other Techniques. A number of the papers submitted were associated with medical ultrasonic diagnostics and acoustic microscopy, reflecting a major activity in acousti cal imaging at Tohoku University. Accordingly, two invited talks were focused on this area: acoustic microscopy by Dr. G. A. D. Briggs of the University of Oxford and medical ultrasonics by Prof. M. Tanaka of Tohoku University. In light of the history of research in this field at our university, we are delighted to have had the opportunity to host the 17th symposium.
Table of ContentsAcoustic Microscopy and Its Applications.- (Invited) Acoustic Microscopy of Old and New Materials.- Dual-Beam Differential Amplitude Contrast Scanning Acoustic Microscopy.- What Can Scanning Acoustic Microscopy Tell about Animal Cells and Tissues ?.- Advanced Features for the Qualification of Coatings by Means of Reflective Acoustic Microscopy.- Acoustic Microscope Study of a Titanium Diffusion Bond.- Application of Scanning Acoustic Microscope to Ferroelectrics.- Continuous Wave Reflection Scanning Acoustic Microscope (SAMCRUW).- Visualization of Ultrasonic Waves Propagating in Scanning Acoustic Microscope.- Time-Resolved Acoustic Microscopy of Polymer Coatings.- Broadband Acoustic Microscopy: Scanned Images with Amplitude and Velocity Information.- Non Destructive Evaluation of Composite Materials Using Acoustic Microscopy.- Acoustic Microscopy: Deep Focusing Inside Materials at Gigahertz Frequencies.- Data Acquisition Phase Error Estimation and Correction in Tomographic Acoustic Microscopy.- In-Situ Measurement of Cathodic Disbonding of Polybutadiene Coating on Steel.- Application of Acoustic Microscopy in Dental Research.- Line Focus Acoustic Lens with Wedge Transducer Source.- Image of Ion Beam Excited Acoustic Microscope of the Teeth.- Amplitude and Phase Acoustic Microscopy and Its Application to QNDE.- Considerations for Quantitative Characterization of Biological Tissues by Scanning Acoustic Microscopy.- Quantitative Display of Acoustic Properties of the Biological Tissue Elements.- Continuous Wave Operation of Acoustic Microscope Using Doppler Modulation.- A Possibility for Ultrasound Flow Measurement with Microscopic Resolution.- Non-Conventional Pin Scanning Ultrasonic Microscopy.- Non-Destructive Evaluation.- Accurate Reconstruction of Flaws Using a New Imaging Technique.- Acoustical Imaging Using a DAIS Technique for Non-Destructive Testing.- Analysis of Echoes from a Sphere in Focused Sound Field and Its Application to Material Characterization.- Evaluation of Polymer Coatings by Ultrasonic Spectroscopy.- Signal Processing of Images.- Optimal Partial-Discrete Algorithm for Time-Delay Estimation.- Imaging the Acoustic Non-Linear Parameter with Diffraction Tomography.- Display Techniques of Volume Images of Buried Objects in Piled Snow by Acoustical and Microwave Holographic Radar.- Speckle Noise Reduction Using PM Pulses.- Temporal Phase as an Imaging and Correction Tool.- Phase Reconstruction from Amplitude Based on the Rytov Transformation of the Wave Equation.- Ultrasonic Imaging Using Correlation Techniques Computer Simulations and Experimental Results.- Reconstruction of Local Reflectivity with 3-D Deconvolution.- Optimal Time Domain Deconvolution for the High-Resolution Computerized Ultrasound Echo Tomography.- An Application of AR Model to Multifrequency Hologram.- Acoustic Measurements and Physical Acoustics.- Ultrasonic Phase Conjugator Using Micro Particle Suspended Cell and Its Application.- Sonic Velocities in Bone at 10GHz Frequencies.- Educational Film for Ultrasonic Engineers (Part II).- The Performance of a Leaky Surface Acoustic Wave Transducer Consisting of PVDF and Fused Quartz.- Diffraction Artefacts and Their Removal.- Testing Surface Layer of Pavement with an Ultrasonic Method.- Acoustic Characteristics of Snow.- A Statistical Approach to Sound Scattering in Random Inhomogeneous Medium.- Comparison of Numerical Ultrasonic Imaging with Phtoelastic Imaging.- Measurement of SAW Velocity by Focussing System Using Fresnel Phase Plate IDT.- Medical Ultrasonic Diagnostics.- (Invited) Usefulness of Ultrasonic Imaging in the Medical Field.- A Method of Flow Vector Mapping Deduced Doppler Data on Sector Scanned Plane.- Two-Dimensional Mapping of the Velocity Vector Distribution of the Intraventricular Blood Flow.- Considerations on Signal-to-Noise Ratio in a Continuous Wave Doppler System Using an Array Transducer.- A Fundamental Evaluation of in Vivo Sound Speed Mapping Technique by Crossed Beam Method.- Movement Analysis Using B-Mode Images.- Ultrasonic Speckle Velocimetry.- Ultrasound Attenuation Estimation in Soft Tissue Using the Entropy Difference of Pulsed Echoes between Two Adjacent Envelope Segments.- A New Method for Quantitative Reflection Imaging.- Analysis of the Behavior of Intraventricular Blood Flow in Myocardial Infarction by Two-Dimensional Velocity Vector Distribution.- Acoustic Sensors.- The Focusing Performance of Zone Plate Transducers.- High Resolution Ultrasonic Imaging Using a Large Aperture Annular Array Transducer of P(VDF-TrFE) Copolymer.- Array Configuration to Eliminate Grating Lobes.- The Sensitivity of Miniature Hydrophones Made of P(VDF-TrFE) Thin Film.- A Mechanical-Scanning Ultrasonic Transducer for QNDT Imaging.- Tonpilz Piezoelectric Transducers with Acoustic Matching Plates for Underwater Color Image Transmission.- PVDF-DMOS Sensors and Array for Underwater Acoustic Imaging.- Study on Quartz Thickness-Shear Resonator Immersed in Liquid and Its Biosensor Application.- Acoustic Holography and Tomography.- Alternative Error Measures for Non-Diffraction and Diffraction Tomography.- Algorithm Comparison and Parameter Consideration in TOF Tomography.- Flow Velocity Field Tomography Using Multiple Ultrasonic Beam Detectors and High Order Correlation Analysis.- Limited-Angle Planar Diffraction Tomography Using Optimal Incident Angles.- A Unified Theory for Acoustical Holography and Diffraction Tomography.- Measurement of Internal Temperature Distribution Using Ultrasonic Computed Tomography.- Acoustical Tomography Using Sparse Data and Irregular Geometries.- Fresnel Diffraction Holography Simulation by a Personal Computer.- Seismic Exploration.- Detection of Shallow Underground Cavities by Seismic Methods: Physical Modelling Approach.- Ultrasonic Imaging for the Seismic Model Fault Plane.- Incomplete Projection Imaging between Boreholes for Geophysical Exploration.- Acoustical Imaging of Earth Near-Surface Inhomogeneities by an Echographic Technique.- Imaging Instrumentation and Other Techniques.- Ghost and Shadow Zone in Ultrasonic Sector Scan B-Mode Image.- Holographic Sonar Using Orthogonal Transmitting Pulses.- Differential Frequency Response and Its Application to a Step Frequency Sonar.- A Method for Implementing Dot Reflective Arrays.- Participants.- Author Index.