Proceedings of the 25th International Symposium on Acoustical Imaging : held March 19-22, 2000, in Bristol, United Kingdom

The origin ofthe International Acoustical Imaging Symposium series can be traced to 1967, when a meeting on acoustical holography was held in C alifornia. In those days, acoustical holography was at the leading edge of research but, as the importance of this subject waned, so the title of the series was changed from Acoustical Holography to Acoustical Imaging in 1978. The early Symposia were held at various venues in the United States. In 1980. the series became international, with the Symposium that year taking place in Cannes in France. The pattern now is to try to met alternately in the USA and in another part of the world so that active researchers everywhere can conveniently attend at a reasonably high frequency. It was a great privilege for us in Bristol in the United Kingdom to be chosen to host the 25th Symposium, which convened on 19 March 2000 and spread over four days. We were blessed not only by good weather, but also by the attendance ofnearly 100 pa rticipants who came from 17 c ountries. A large number of papers were accepted for presentation, either orally or as posters. Whether an oral presentation or a poster, all were considered to have equal merit, and no distinction is made between them in the published proceedings. There were no parallel sessions, so every participant could attend every presentation. The re sultant disciplinary cross fertilisation maintained the t radition of past Symposia. Turning Points in Diagnostic Ultrasound....Pages 1-8 Ultrasonic Tissue Characterization....Pages 9-25 Design-Directed Research: A New Funding Paradigm....Pages 27-31 Computation of Linear Ultrasound Fields Using 2D Fourier-Bessel Series....Pages 33-39 Field Analysis with a New Field Simulation and Propagation Technique....Pages 41-50 Tuning of Bessel Beams on Annular Arrays....Pages 51-57 Finite Element Modelling of Pulsed Bessel Beam and X-Waves Using Diffpack....Pages 59-64 Numerical Realization of Algorithm for Exact Solution of Two-Dimensional Monochromatic inverse Problem of Acoustical Scattering....Pages 65-70 Modeling Inverse Problems for Statistical Estimation of Scatterer Characteristics....Pages 71-78 Born Ultrasonic Tomography: Some Limits and Improvements....Pages 79-86 A New Circular-Scanning Ultrasonic Diffraction Tomography....Pages 87-92 Determination of Surface Wave Velocites in Initially Deformed, Anisotropic Layered Solids....Pages 93-100 Comparison Between Time Reversal and Inverse Filter Focusing....Pages 101-108 Increasing Resolution Capability of Two-Dimensional Tomograph over Third Coordinate: Separating Reconstruction of c(r)-, ρ(r)-m α(r,ω)-Scatterer Characteristics....Pages 109-116 Practical Design of Multilayer Piezoelectric Transducers for Harmonic Imaging....Pages 117-122 A Stochastic Approach to Optimise Wide-Band Beam Patterns....Pages 123-130 Non-Uniform Piezoelectric Ceramic Polarisation: Minimising Ultrasound Field Diffraction....Pages 131-136 A New Method for Measuring Ultrasound Beams Phase Distribution....Pages 137-144 A Simple Calculation Approach for the Parametric Sound Field Generated by a Focused Annular Array: Application to Vibroacoustography....Pages 145-150 A Convex-Convex Shaped Two-Dimensional Array Probe Using Multilayer PZT Transducers....Pages 151-156 Ultrasonic Imaging with 2D Matrix Transducers....Pages 157-162 Narrow Aperture Phased Array Computed Tomography....Pages 163-170 An Alternative Technique for Acoustic Characterization of Composite Ultrasonic Transducers for Medical Application....Pages 171-176 Towards an Intra-Arterial Probe for Imaging and Therapy Using Laser-Generated Ultrasound....Pages 177-182 Pseudospectral Time-Domain Modeling of Nondestructive Ultrasonic Fields....Pages 183-188 Stampede — “Standard Techniques for Acoustic Microscopy for Plastic Encapsulated Devices”....Pages 189-196 Ultrasonic NDE Using Instantaneous Phase Information Via Morlet Wavelet Transform....Pages 197-202 Resonant Photoacoustic Detection and Imaging Scheme....Pages 203-207 Acoustography Applied to the Monitoring of Impact Damage Growth in Composites under Fatigue Conditions....Pages 209-216 Two Underwater Examples of Imaging by Multi-Look Synthesis....Pages 217-224 Reconstruction of Evolving Shallow Water Bubble Clouds by Acoustic Tomography....Pages 225-228 Acoustical Ray Tracing System for Visualizing Simulated Sound Reflection from a Plane Rock Wall in Acoustical Archaeology....Pages 229-234 Methods of Multibeam Echosounders Resolution Increasing....Pages 235-240 A Satellite Laboratory for Acoustical Imaging Using a Communications Satellite....Pages 241-246 Angular Spectrum Approach to Time-Resolved Acoustic Microscopy....Pages 247-252 Imaging of Ferroelectric Domains by Atomic Force Acoustic Microscopy....Pages 253-260 Scanning Acoustic Microscopy Case Studies of Microelectronic Packaging....Pages 261-272 Residual Stress Characterization by Scanning Electron Acoustic Microscopy....Pages 273-278 Doppler Ultrasonic Imaging....Pages 279-288 Modeling of the Acoustic Signal Backscattered by a Biphasic Suspension: Application to the Characterization of Red Blood Cell Aggregation....Pages 289-295 Frequency Dependence of Simulated Ultrasound Signals Backscattered by Aggregating Red Blood Cells....Pages 297-302 20-MHZ US Backscatter Measurements and Reproducibility: Normal Human Dermis in Vivo ....Pages 303-308 Recent Experience with Acoustical Holography for Breast Imaging....Pages 309-316 A Theory to Account for Phase Variation and Diffraction in Ultrasound Image Formation....Pages 317-324 High Frequency Reflex Transmission Imaging: Feasibility for Eventual Application to the Diagnosis of Skin Tumours....Pages 325-330 Real-Time Spatial Compound Imaging: Technical Performance in Vascular Applications....Pages 331-342 Medical Application of Soliton Imaging....Pages 343-349 Ultrasonic Tissue Characterization Using Singular Spectrum Analysis and Entropy: Simulated Results....Pages 351-356 The Maxwell Model as a Soft Tissue Descriptor....Pages 357-361 Characterization of Collagen Fibers in Atherosclerotic Plaques in Mice....Pages 363-368 Quantitative Images Based on Us Backscatter and Attenuation (5 to 28 MHz) for Characterization of Carotid Plaque Content....Pages 369-374 Assessment of Skeletal Status Using an Axial Transmission Technique: A Theoretical and Experimental Investigation....Pages 375-380 Wideband Ultrasound to Determine Lipid Concentration in Fish....Pages 381-388 Non-Contact Ultrasonic Imaging for the Quantitative and Noninvasive Evaluation of Thermal Injury....Pages 389-394 Ultrasound Temperature and Attenuation Monitoring for Controlling the Laser Induced Thermo Therapy....Pages 395-400 Second Harmonic Coefficient of Nonlinearity for Ultrasound Contrast Agent....Pages 401-406 The Application of Wavelet Transforms to Tissue Characterization and Flow Imaging....Pages 407-412 Spatial Distribution of Eigenvibration on the Heart Wall....Pages 413-418 Radiofrequency Real Time Processing: Ultrasonic Spectral Images and Vector Doppler Investigation....Pages 419-426 Ultrasound Storage Correlator Arrays for Real-Time Blood Flow Velocity Vector Imaging....Pages 427-436 Simulation of Power Doppler Angiographic Images of a Severe Stenosis....Pages 437-442 Doppler Beam Steering for Blood Flow Velocity Vector Imaging....Pages 443-448 Dynamic Effects of Acoustic Radiation Force on Microbubbles....Pages 449-456 Imaging of Tissue Elastic Modulus Distribution Base on Estimated 3-D Displacement Vector....Pages 457-460 Elasticity Imaging of Incompressible Biological Soft Tissue from Incomplete Ultrasonic Displacement Data....Pages 461-468 Reconstructing Young’s Modulus Distributions within Soft Tissues From Freehand Elastograms....Pages 469-476 Elastic Contrast Detection: A Comparison of Performance for Elastography and For the Direct Observation of B-Mode Movies during Palpation....Pages 477-484 2D Transient Elastography....Pages 485-492 Advancing Intravascular Palpography Towards Clinical Application....Pages 493-500 Mineralized Tooth Tissue Study Using Scanning Acoustic Microscopy....Pages 501-506 Bone Imaging by Low Frequency Ultrasonic Reflection Tomography....Pages 507-514 Ultrasonic Transmission Tomography of the Human Femur: Application and Limits....Pages 515-522 Shape and Size Petrieval of Obstacles by Nonlinear Inversion of Measured Scattered Field Data in Response to Audible Probe Radiation....Pages 523-528 Performance of Ultrasound Echo Decomposition Using Singular Spectrum Analysis: Monte Carlo Approach....Pages 529-534 Image Formation with the Amplitude-Steered Array Using Time-Frequency Distributions....Pages 535-542 Vibro-Acoustography: Speckle Free Ultrasonic C-Scan....Pages 543-548 Laser-Ultrasound for Interface Monitoring within the Eye....Pages 549-554 The International Symposium Of Acoustical Imaging Has Been Widely Recognized As The Premier Forum For Presentations Of Advanced Research Result In Both Theoretical And Experimental Development. Held Regularly Since 1968, The Symposium Brings Together International Leading Researchers In The Area Of Acoustical Imaging. The Proceedings From The 25th Meeting Contains Articles On The Following Topics: Mathematics And Physics Of Acoustical Imaging, Transducers And Arrays, Nondestructive Evaluation, Geophysical And Underwater Ultrasonics, Microscopy And Microscanning, Scattering By Blood And Tissue, Medical And Biological Image Formation, Tissue Characterization, Tissue And Motion And Blood Flow, Elasticity Imaging, Hard Tissues, And Novel And Emerging Methods. The 26th lAIS was organized in the traditional way with only one addition-a Special Session "History of Acoustical Imaging" with the involvement of such well known scientists as Andrew Briggs, Noriyoshi Chubachi, Robert Green Jr., Joie Jones, Kenneth Erikson, and Bernhard Tittmann.