Assessment of the depth-dependence of the mechanical parameters of a layered medium using surface excitation and motion measurements on the surface

Salavat Aglyamov, Shang Wang, Andrei Karpiouk, Jiasong Li, Michael Twa, Stanislav Emelianov, Kirill V. Larin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

In this study the dynamic behavior of a layered viscoelastic medium in response to the impulsive acoustic radiation force applied to its surface was investigated. To verify our theoretical model, experiments were performed using tissue-like gel-based phantoms of varying mechanical properties. A 3.5 MHz single-element focused transducer was used to apply the radiation force at the surface of the phantoms and a phase-sensitive OCT system was used to track the displacements on the phantom surface. The results of this study demonstrate good agreement between theoretical predictions and experimental measurements. It was demonstrated that layers at different depths introduce responses at different frequencies. Therefore, the proposed model in combination with spectral analysis can be used to evaluate depth dependant distribution of the mechanical properties based the measurements on the tissue surface.

Original languageEnglish
Title of host publication2013 IEEE International Ultrasonics Symposium, IUS 2013
Pages1252-1255
Number of pages4
DOIs
StatePublished - 2013
Event2013 IEEE International Ultrasonics Symposium, IUS 2013 - Prague, Czech Republic
Duration: 21 Jul 201325 Jul 2013

Publication series

NameIEEE International Ultrasonics Symposium, IUS
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Conference

Conference2013 IEEE International Ultrasonics Symposium, IUS 2013
Country/TerritoryCzech Republic
CityPrague
Period21/07/1325/07/13

Keywords

  • Acoustic radiation force
  • Elastography
  • Layered medium
  • Viscoelasticity

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