IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 2011-02, Vol.58 (2), p.389-398
2011
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Details
- Autor(en) / Beteiligte
- Titel
- 3-D FDTD simulation of shear waves for evaluation of complex modulus imaging
- Ist Teil von
- IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 2011-02, Vol.58 (2), p.389-398
- Ort / Verlag
- New York, NY: IEEE
- Erscheinungsjahr
- 2011
- Quelle
- IEEE Electronic Library Online
- Beschreibungen/Notizen
- The Navier equation describing shear wave propagation in 3-D viscoelastic media is solved numerically with a finite differences time domain (FDTD) method. Solutions are formed in terms of transverse scatterer velocity waves and then verified via comparison to measured wave fields in heterogenous hydrogel phantoms. The numerical algorithm is used as a tool to study the effects on complex shear modulus estimation from wave propagation in heterogeneous viscoelastic media. We used an algebraic Helmholtz inversion (AHI) technique to solve for the complex shear modulus from simulated and experimental velocity data acquired in 2-D and 3-D. Although 3-D velocity estimates are required in general, there are object geometries for which 2-D inversions provide accurate estimations of the material properties. Through simulations and experiments, we explored artifacts generated in elastic and dynamic-viscous shear modulus images related to the shear wavelength and average viscosity.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0885-3010eISSN: 1525-8955DOI: 10.1109/TUFFC.2011.1816Titel-ID: cdi_proquest_journals_853742284
- Format
- –
- Schlagworte
- Acoustic signal processing, Acoustics, Algorithms, Biological and medical sciences, Computer Simulation, Elastic Modulus, Exact sciences and technology, Finite difference methods, Finite difference time domain method, Frequency measurement, Fundamental areas of phenomenology (including applications), Hydrogel, Polyethylene Glycol Dimethacrylate, Inversions, Investigative techniques, diagnostic techniques (general aspects), Mathematical analysis, Mathematical model, Mathematical models, Medical sciences, Miscellaneous. Technology, Needles, Phantoms, Phantoms, Imaging, Physics, Propagation, Shear modulus, Solid modeling, Studies, Time domain analysis, Ultrasonic investigative techniques, Ultrasonography - methods, Viscosity, Wave propagation