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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Selzo, M.R. Gallippi, C.M. |
| Copyright Year | 2014 |
| Description | Author affiliation: Joint Dept. of Biomed. Eng., Univ. of North Carolina at Chapel Hill, Chapel Hill, NC, USA (Selzo, M.R.; Gallippi, C.M.) |
| Abstract | Viscoelastic Response (VisR) ultrasound is an acoustic radiation force (ARF)-based imaging method for noninvasively interrogating the viscoelastic properties of tissue. ViSR ultrasound uses two successive ARF impulses delivered to a single region of excitation (ROE) and tracks the micrometer-scale induced displacements. We have previously demonstrated that tracked displacements can be fit to the mass-spring-damper model in order to measure the relaxation time constant, τ, given by the ratio of viscosity to elasticity. Because it is a ratio, we cannot determine a change in τ is due to changes in elasticity, viscosity, or both. However, elasticity and viscosity may be evaluated uniquely by VisR if considered relative to the magnitude of the forcing function. It is hypothesized that their separation enhances discrimination of viscoelastic materials in VisR ultrasound. We demonstrate that VisR is able to isolate elasticity and viscosity from τ in FEM simulated data and experimentally in a gelatin phantom with a soft inclusion. |
| Starting Page | 1117 |
| Ending Page | 1120 |
| File Size | 532502 |
| Page Count | 4 |
| File Format | |
| e-ISBN | 9781479970490 |
| DOI | 10.1109/ULTSYM.2014.0274 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-09-03 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Viscosity Elasticity Ultrasonic imaging Mathematical model Force Finite element analysis finite element model Viscoelastic Response (VisR) ultrasound Acoustic Radiation Force (ARF) elasticity viscosity mass-spring-damper model |
| Content Type | Text |
| Resource Type | Article |
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