Shear wave induced resonance: A new excitation mode for dynamic elastography imaging

Author

Henni, Anis Hadj ; Schmitt, Cédric ; Cloutier, Guy

Author_Institution

Hosp. Res. Center, Univ. of Montreal, Montreal, QC

fYear

2008

fDate

2-5 Nov. 2008

Firstpage

221

Lastpage

224

Abstract

A new method for dynamic elastography of heterogeneous media based on shear wave induction of resonance is proposed. When a confined heterogeneity is excited by a properly selected shear wave at its eigenfrequencies, resonance phenomena appear. The corresponding eigenmodes have the property to be confined into the heterogeneity allowing its discrimination from displacement maps. This phenomenon was first investigated theoretically and validated experimentally. Then, the potential of shear wave induced resonance (SWIR) in the context of dynamic elastography and material characterization is discussed.

Keywords

acoustic resonance; biological tissues; biomechanics; biomedical ultrasonics; dynamic elastography imaging; eigenfrequency; eigenmode imaging; excitation mode; heterogeneous media; material characterization; shear wave induced resonance; ultrasonic tissue imaging; Analytical models; Biomedical imaging; Elasticity; Frequency; Imaging phantoms; Magnetic materials; Magnetic resonance imaging; Pathology; Ultrasonic imaging; Vibrations; Dynamic elastography; Material characterization; Resonance imaging; Shear waves; Ultrasound;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2008. IUS 2008. IEEE

Conference_Location

Beijing

Print_ISBN

978-1-4244-2428-3

Electronic_ISBN

978-1-4244-2480-1

Type

conf

DOI

10.1109/ULTSYM.2008.0054

Filename

4803472