NDLI: Reconstructions of shear modulus, poisson's ratio, and density using approximate mean normal stress /spl lambda//spl epsiv//sub /spl alpha//spl alpha// as unknown

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IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control - Dec. 2006

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Table of contents - Vol 53 No 12

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Introduction to the special issue on Nanoscale Ferroelectrics

Investigating the effects of reduced size on the properties of ferroelectrics

A decade of piezoresponse force microscopy: progress, challenges, and opportunities

Sample-tip interaction of piezoresponse force microscopy in ferroelectric nanostructures

Advanced fabrication and characterization of epitaxial ferroelectric thin films and multilayers

Dielectric investigations and theoretical calculations of size effect in lead titanate nanocrystals

Evolution of nanodomains in the uniaxial relaxor Sr/sub 0.61/Ba/sub 0.39/Nb/sub 2/O/sub 6/:Ce

KTa/sub 0.6/Nb/sub 0.4/O/sub 3/ ferroelectric thin film behavior at microwave frequencies for tunable applications

Comparative measurements of piezoelectric coefficient of PZT films by berlincourt, interferometer, and vibrometer methods

Ferroelectric-based electrostatic micromotors with nanometer gaps

Piezoelectric ultrathin lead titanate films prepared by deposition of aquo-diol solutions

Dielectric spectroscopy of Nano BaTiO/sub 3/ confined in MCM-41 mesoporous molecular sieve materials

Higher-order electromechanical response of thin films by contact resonance piezoresponse force microscopy

Paraelectric thin films by nanoscale engineering of epitaxy and planar anisotropy for microwave phase shifter applications

Ultra-thin and isolated dots in polycrystalline lead zirconate titanate films

1-D simulation of a novel nonvolatile resistive random access memory device

Interlayer coupling in ferroelectric bilayer and superlattice heterostructures

Flextensional ultrasonic piezoelectric micro-motor

Characterization of dissipation factors in terms of piezoelectric equivalent circuit parameters

Microwave leakage-induced frequency shifts in the primary frequency Standards NIST-F1 and IEN-CSF1

Long-term operation and performance of cryogenic sapphire oscillators

Feasibility of noncontact intracardiac ultrasound ablation and imaging catheter for treatment of atrial fibrillation

Nonlinear propagation of ultrasound through microbubble contrast agents and implications for imaging

Reconstructions of shear modulus, poisson's ratio, and density using approximate mean normal stress /spl lambda//spl epsiv//sub /spl alpha//spl alpha// as unknown

Amplitude modulation drive to rectangular-plate linear ultrasonic motors with vibrators dimensions 8 mm /spl times/ 2.16 mm /spl times/ 1 mm

Perturbation analysis of frequency shifts in an electroelastic body under biasing fields

Recurrent RBFN-based fuzzy neural network control for X-Y-/spl Theta/ motion control stage using linear ultrasonic motors

High-temperature 434 MHz surface acoustic wave devices based on GaPO/sub 4/

Two-dimensional electroacoustic model of transducer array based on 1-3 piezocomposite materials

Potential of acoustic imaging in the detection of nanometer gaps

Electrostatic transducers for micromechanical resonators: free space and solid dielectric

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Reconstructions of shear modulus, poisson's ratio, and density using approximate mean normal stress /spl lambda//spl epsiv//sub /spl alpha//spl alpha// as unknown

Content Provider	IEEE Xplore Digital Library
Author	Sumi, C.
Copyright Year	1986
Abstract	As a differential diagnosis technique for living soft tissues, we are developing ultrasonic-strain-measurement-based shear modulus reconstruction methods. Previously, we reported three-dimensional (3D) and 2D reconstruction methods utilizing a typical Poisson's ratio very close to 0.5 (nearly incompressible). However, because a decrease in the accuracy of the reconstructed value was confirmed to be due to the difference between the original value and the set value, we proposed 3D and 2D methods of reconstructing Poisson's ratio as well. Furthermore, we proposed methods of reconstructing density and dealing with dynamic deformation. However, due to tissue incompressibility, the reconstructions of shear modulus, Poisson's ratio, and density became unstable. In this report, to obtain stable, unique reconstructions, we describe a new reconstruction method using mean normal stress approximated by the product of one of Lame's constants lambda and volume strain epsiv_alphaalpha as an unknown. Regularization is simultaneously applied to the respective distributions to decrease the instability of the reconstructions due to measurement errors of the deformation. This method also enables stable, unique reconstructions of shear modulus and density under the condition that the mean normal stress remains unknown. We also verify the effectiveness of this method through 3D simulations, while showing erroneous artifacts occurring when 2D and 1D reconstructions are performed
File Size	4348060
File Format	PDF
ISSN	08853010
Volume Number	53
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stress Image reconstruction Reconstruction algorithms Biological tissues Multidimensional signal processing Displacement measurement Inverse problems Space technology Magnetic field measurement Iterative methods
Content Type	Text
Resource Type	Article
Subject	Acoustics and Ultrasonics Instrumentation Electrical and Electronic Engineering

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