Theoretical analysis of shear wave interference patterns by means of dynamic acoustic radiation forces

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Acoustic radiation forces associated with high intensity focused ultrasound stimulate shear wave propagation allowing shear wave speed and shear viscosity estimation of tissue structures. As wave speeds are meters per second, real time displacement tracking over an extend field-of-view using ultrasound is problematic due to very high frame rate requirements. However, two spatially separated dynamic external sources can stimulate shear wave motion leading to shear wave interference patterns. Advantages are shear waves can be imaged at lower frame rates and local interference pattern spatial properties reflect tissue's viscoelastic properties. Here a theoretical analysis of shear wave interference patterns by means of dynamic acoustic radiation forces is detailed. Using a viscoelastic Green's function analysis, tissue motion due to a pair of focused ultrasound beams and associated radiation forces are presented. Overall, this paper theoretically demonstrates shear wave interference patterns can be stimulated using dynamic acoustic radiation forces and tracked using conventional ultrasound imaging.

Original languageEnglish (US)
Pages (from-to)9-23
Number of pages15
JournalInternational Journal of Multiphysics
Volume5
Issue number1
DOIs
StatePublished - Mar 1 2011

Fingerprint

Acoustic Radiation
Wave interference
Shear waves
sound waves
S waves
Theoretical Analysis
Interference
Acoustics
interference
Radiation
Ultrasound
Ultrasonics
Wave Speed
Tissue
Shear Viscosity
Shear viscosity
Motion
Spatial Pattern
Field of View
Green's function

ASJC Scopus subject areas

  • Computational Mechanics
  • Numerical Analysis
  • Modeling and Simulation
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

Cite this

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