Shear wave speed recovery in sonoelastography using crawling wave data

Kui Lin, Joyce McLaughlin, Daniel Renzi, Ashley Thomas

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The crawling wave experiment, in which two harmonic sources oscillate at different but nearby frequencies, is a development in sonoelastography that allows real-time imaging of propagating shear wave interference patterns. Previously the crawling wave speed was recovered and used as an indicator of shear stiffness; however, it is shown in this paper that the crawling wave speed image can have artifacts that do not represent a change in stiffness. In this paper, the locations and shapes of some of the artifacts are exhibited. In addition, a differential equation is established that enables imaging of the shear wave speed, which is a quantity strongly correlated with shear stiffness change. The full algorithm is as follows: (1) extract the crawling wave phase from the spectral variance data; (2) calculate the crawling wave phase wave speed; (3) solve a first-order PDE for the phase of the wave emanating from one of the sources; and (4) compute and image the shear wave speed on a grid in the image plane.

Original languageEnglish
Pages (from-to)88-97
Number of pages10
JournalJournal of the Acoustical Society of America
Volume128
Issue number1
DOIs
Publication statusPublished - 1 Jul 2010

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ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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