title: Shear wave induced resonance elastography of spherical masses with polarized torsional waves.
abstract: Shear Wave Induced Resonance (SWIR) is a technique for dynamic ultrasound elastography of confined mechanical inclusions. It was developed for breast tumor imaging and tissue characterization. This method relies on the polarization of torsional shear waves modeled with the Helmholtz equation in spherical coordinates. To validate modeling, anin vitroset-up was used to measure and image the first three eigenfrequencies and eigenmodes of a soft sphere. A preliminaryin vivoSWIR measurement on a breast fibroadenoma is also reported. Results revealed the potential of SWIR elastography to detect and mechanically characterize breast lesions for early cancer detection.
authors.affiliation: Laboratory of Biorheology and Medical Ultrasonics, University of Montreal Hospital Research Center (CRCHUM), Montreal, QC, Canada, H2L 2W5.
authors.forename: Anis Hadj
authors.initials: AH
authors.lastname: Henni
authors.forename: Cédric
authors.initials: C
authors.lastname: Schmitt
authors.forename: Isabelle
authors.initials: I
authors.lastname: Trop
authors.forename: Guy
authors.initials: G
authors.lastname: Cloutier
keywords: Shear wave induced resonance; breast cancer; torsional waves; ultrasound elastography; ultrasound focusing; viscoelasticity