Title :
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
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;
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
DOI :
10.1109/ULTSYM.2008.0054
