Air-coupled ARF-based excitation of broadband mechanical waves for dynamic elastography

Liang Gao, Piotr Kijanka, Mitchell Kirby, Ivan Pelivanov, Lukasz Ambrozinski, Shaozhen Song, David Li, Soon Joon Yoon, Ruikang Wang, Matthew O'Donnell

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

Abstract

Recently we demonstrated non-contact excitation of broadband mechanical waves in soft media for transient elastography. Using US from an air-coupled transducer focused on an air/medium interface, this method (called 'acoustic micro-tapping', or AμT) provides sufficient radiation force to launch a transient displacement. Combined with ultrafast phase sensitive OCT, AμT-OCT can track propagating mechanical waves with a fully non-contact system appropriate for many applications. Complementary methods are now needed to properly reconstruct the elastic modulus from imaged wavefields. Here we explore the different modes launched by an AμT source that can be tracked efficiently with OCT. The motivation is an optimal method to reconstruct the elastic modulus from complex displacement fields given the highly dispersive nature of waves in bounded media such as the cornea.

Original languageEnglish (US)
Title of host publication2017 IEEE International Ultrasonics Symposium, IUS 2017
PublisherIEEE Computer Society
ISBN (Electronic)9781538633830
DOIs
StatePublished - Oct 31 2017
Event2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States
Duration: Sep 6 2017Sep 9 2017

Publication series

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

Other

Other2017 IEEE International Ultrasonics Symposium, IUS 2017
CountryUnited States
CityWashington
Period9/6/179/9/17

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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