Harmonic vibro-acoustography

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Vibro-acoustography is an imaging method that uses the radiation force of two interfering ultrasound beams of slightly different frequency to probe an object. An image is made using the acoustic emission resulted from the object vibration at the difference frequency. In this paper, the feasibility of imaging objects at twice the difference frequency (harmonic acoustic emission) is studied. Several possible origins of harmonic acoustic emission are explored. As an example, it is shown that microbubbles close to resonance can produce significant harmonic acoustic emission due to its high nonlinearity. Experiments demonstrate that, compared to the fundamental acoustic emission, harmonic acoustic emission greatly improves the contrast between microbubbles and other objects in vibro-acoustography (an improvement of 17-23 dB in these experiments). Applications of this technique include imaging the nonlinearity of the object and selective detection of microbubbles for perfusion imaging. The impact of microbubble destruction during the imaging process also is discussed.

Original languageEnglish (US)
Pages (from-to)1346-1351
Number of pages6
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume54
Issue number7
DOIs
StatePublished - Jul 2007

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acoustic emission
Acoustic emissions
harmonics
Imaging techniques
nonlinearity
imaging techniques
Vibrations (mechanical)
destruction
Ultrasonics
Experiments
Radiation
vibration
probes
radiation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Acoustics and Ultrasonics

Cite this

Harmonic vibro-acoustography. / Chen, Shigao D; Kinnick, Randall R.; Greenleaf, James F; Fatemi, Mostafa.

In: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Vol. 54, No. 7, 07.2007, p. 1346-1351.

Research output: Contribution to journalArticle

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