Effects of phase aberration on acoustic radiation force-based shear wave generation

Carolina Amador, Sara Aristizabal, James F. Greenleaf, Matthew W. Urban

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Tissue elasticity is measured by shear wave elasticity imaging methods using acoustic radiation force to create the shear waves. Reliable tissue elasticity measurements are achieved with strong shear waves. Phase aberration and tissue attenuation can hamper the generation of shear waves for in vivo applications. In this study we explored how phase aberration and tissue attenuation affects ultrasound focusing for creating shear waves, the resulting phase screen, acoustic field, shear wave amplitude and the shear wave velocity were measured. A Verasonics ultrasound system equipped with a linear array transducer (L7-4), an excised piece of swine belly tissue consisted of the skin, subcutaneous fat, and muscle and an elastic phantom were used. The ultrasound frequency used to generate shear waves was varied. The acoustic pressure and shear wave amplitude decreased with the introduction of the tissue layers. Decreasing the ultrasound frequency was important for maintaining a focused beam for creation of shear waves in the presence of phase aberration and attenuation. Analysis of shear wave production with a tissue layer (aberration and attenuation case) and measured phase screen (only aberration case) showed that tissue attenuation affects the shear wave generation more than tissue aberration.

Original languageEnglish (US)
Title of host publicationIEEE International Ultrasonics Symposium, IUS
PublisherIEEE Computer Society
Pages2316-2319
Number of pages4
ISBN (Electronic)9781479970490
DOIs
StatePublished - Oct 20 2014
Event2014 IEEE International Ultrasonics Symposium, IUS 2014 - Chicago, United States
Duration: Sep 3 2014Sep 6 2014

Publication series

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

Other

Other2014 IEEE International Ultrasonics Symposium, IUS 2014
CountryUnited States
CityChicago
Period9/3/149/6/14

Keywords

  • Shear wave
  • attenuation
  • phase aberration

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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    Amador, C., Aristizabal, S., Greenleaf, J. F., & Urban, M. W. (2014). Effects of phase aberration on acoustic radiation force-based shear wave generation. In IEEE International Ultrasonics Symposium, IUS (pp. 2316-2319). [6931929] (IEEE International Ultrasonics Symposium, IUS). IEEE Computer Society. https://doi.org/10.1109/ULTSYM.2014.0577