Acoustical Imaging

Opening Session.- Ultrasonic Therapy and Imaging in Ophthalmology.- Resolution Limits of Acoustical Echo Systems.- Modeling 1.- The Acoustic Response of a Sphere in a Two-layer Half-space.- The Bandlimited Pulse from a Dynamite Source in an Elastic Medium.- Changes in Seismic Pulse Forms due to Diffraction Effects (Abstract).- Seismic Analysis of Thin Beds aided by 3D Physical Model Experiments.- Inversion 1.- Resolution in Sonar Systems ¿ a Review.- Experience with a Long Streamer in Seismic Exploration.- Aspects of Spatial Resolution for Long-range, Low-frequency Imaging of the Sea Floor.- Inversion 2.- Acoustical Surveying of Porous Soils.- Reconstruction of One-dimensional Inhomogeneities in Elastic Modulus and Density from Measurements of Acoustic Resonances.- Application of the Phase Closure Technique to Passive Acoustic Imaging through Inhomogeneous Media.- Inversion 3.- Practical Aspects of Spatial Resolution as Applied to Seismic Imaging (Abstract).- Angular Spectrum Decomposition: Improving the Resolution.- Spatial Resolution of Migration Algorithms.- Ray Tracing and Seismic Modeling.- Inversion 4.- Numerically Efficient Full Wavefield Approach to Synthetic Seismogram Computation.- Well-resolved and Poorly-resolved Features in Seismic Reflection Tomography (Abstract).- Resolution Limits in Inversion by Parameter Estimation.- Resolution Enhancement of Processed Seismic Data using Prior Weighting Functions.- Inversion 5.- Scanned Microscopy Techniques.- Imaging with Holosaft.- Recovery of Ultrasonic Impulse Response by Spectral Extrapolation.- Inversion 6.- Numerical Performance of The Schur Algorithm in Seismic Inversion and Continuous-time Prediction Problems.- Time Domain Diffraction Tomography.- Generalized Tomography as an Unified Approach to Linear Inverse Scattering: Theory and Experiment.- Image Reconstruction Fidelity using the Born and Rytov Approximations.- Inversion 7.- Ambiguity Functions for Diffraction Tomography using Back-and-forth Propagation.- Image Reconstruction for Planar Acoustic Tomography using Hexagonal Arrays.- Optimal Observation Angles for Planar Tomography in STAM System.- Acoustic and Thermal Wave Microscopy.- Instrumentation 1.- Spatial Resolution of Thermal-wave and Thermo-acoustic Microscopes.- Ultrasonic Waveforms i n Metal Plates using Laser Generation and EMAT Detection.- Spatial Resolution of Subsurface Structure in Photothermal Imaging.- Toward Quantitative Imaging with the Acoustic Microscope.- Inversion 8.- Diagnostic Ultrasound: History, Transducers, Artefacts and New Applications.- Speckle Reduction in Pulse-echo Images by Using Phase Insensitive Summation and Multiplicative Techniques.- Limited Angle Reflection Mode Computerized Tomography.- Combined Shear-compression Ultrasound Reflection Tomography.- Inversion 9.- Acousto-optic Deconvolution for Real-time Echography.- Prior Inverse Filtering for High Resolution Pulse-Echo Images.- Attenuation Correction using Mellin Transform.- Two-dimensional Wiener Inverse Filtering in Echographyc Imaging: Possibilities and Restrictions.- Information Extraction.- Spatial Resolution in Ultrasonic Pulse Echo Texture Analysis (Abstract).- Texture in B-mode Echograms: a Simulation Study of the Effects of Diffraction and of Scatterer Density on Gray Scale Statistics.- Ultrasonic Imaging using the Instantaneous Frequency of Pulse-echo Signals.- Theory of Q ¿ profiling.- Ultrasonic Tissue Characterization Imaging (Abstract).- Modeling 2.- Modeling of Elastic Wave Phenomena near a Plane Interface.- Propagation of Transient Acoustic Waves in Lossy and Lossless Media.- Diffraction Impulse Response of Non-planar Transducers.- Ultrasonic Defect Positioning by Non-linear Least Squares Curve Fitting.- Instrumentation 2.- A High Spatial Resolution Digital System for Ultrasonic Imaging.- Imaging of Complex Structures by 3D-MIgration Techniques (Abstract).- 1 MHz Ultrasonic Transducer Operating in Air.- Shallow Prospecting on Land by means of a Novel Electro acoustical P-wave Pulse Generator.- Inversion 10.- New Nonlinear Parameter Imaging CT System Using a Parametric Acoustic Array.- Mathematical Modeling of an Ultrasonic Transmission Imaging System Applied to Image Restoration.- Phase Tomography, Velocity and Temperature Measurement.- Posters on Modeling.- Transient Fields from Focused Acoustic Waves.- Time-domain Analysis of Acoustic Wave Propagation, Diffraction and Radiation.- The Diffracted Transient Field of the Rectangular Piston in Loss-less and Absorbing Media.- Posters on Instrumentation.- Acoustic Emission Structure-Borne Noise Measurements on Aircraft during Flight.- Practical Resolution Limitations of Scanning Acoustic Microscopy.- Transmission Thermoacoustic Imaging without Contact.- Range Resolution Improvement with a New Signal Processor implementing a Fast Kalman Estimator.- Display of Ultrasonograms on a Liquid Crystal TV and a Fluorescent Vacuum Tube.- Ultrasonic Biopsy Apparatus.- The Influence of Ultrasonic Probe Design and Construction on Spatial Resolution.- A Versatile Digital Scan Converter for High Quality Imaging.- Study and Realization of Some Annular Array Transducers for Ultrasound Imaging Systems.- Spatial Resolution of the Scanning Acoustic Microscope for Subsurface Imaging of Samples.- Wide Angle Electronic Sector Scanning with Curved Arrays.- High Resolution Sampled Phase-delay Sonar Beamformer.- Posters on Inversion.- One-dimensional Inverse Acoustic Scattering for Lossy Media.- Comparison of Algorithms for High Resolution Deconvolution of Array Beamforming Output.- Application of Acoustical Holography to Nonstationary Random Processes.- Pattern Recognition Application in Underwater Acoustics using Acoustical Holography.- Holographic Imaging with Elastodynamic Waves.- Inverse Filter Design for Holographic Imaging Systems with Small Apertures.- Acoustic Impedance Tomography: Two Reconstruction Procedures.- The Influence of the PSF on Reconstructed B-scan Images.- The Relation between Super-Resolution and A Priori Information in Probabilistic Inverse Scattering.- Derivation of a Fast Kalman Filter for High Resolution B-scan Imaging.- Towards High-resolution Ultrasound Computerized Tomography.- Theoretical and Numerical Results on Scattering from Soft Cylinders with Implications in Diffraction Tomography.- Tomographic Image Reconstruction from Holographic B-scan Signals.- Posters on Information Extraction.- Applications of the Double Frequency Technique in Bubble Sizing and Pressure Measurements in Fluids.- High Resolution Ultrasonic Tissue Characterization.- A New Method for the Analysis of the Frequency Dependence of the Backscattering Coefficient in Tissue-like Media.- Optical-digital Joint Fourier Transform Classification of Liver Echotexture.- Sizing of Defects in Steel Constructions by Ultrasound.- Soft Tissue Movement Information in Ultrasonic M-mode Images.- Underwater Imaging of Cracks in Concrete.- Participants.