Tomographic schlieren imaging for measurement of beam pressure and intensity

Todd A. Pitts, James F. Greenleaf, Jian yu Lu, Randy R. Kinnick

Research output: Contribution to journalConference articlepeer-review

17 Scopus citations

Abstract

The visualization of ultrasonic fields via acousto-optic interaction is an old technique. Shadowgraph and schlieren imaging produce data representing a line integral related to pressure and time-average intensity, respectively. These 'projections' can be used in computed tomography. We have compared the reconstructed pressure distribution in a plane obtained via tomographic inversion with those obtained by mechanically scanning a 0.5 mm calibrated hydrophone through the same plane. Schlieren methods result in the reconstruction of a time average intensity approximation. Shadowgraph methods reconstruct pressure at a given point in time. The advantage of the tomographic methods is that they can be done quickly. A fully automated system could produce a three-dimensional image of an ultrasound beam in a few minutes.

Original languageEnglish (US)
Pages (from-to)1665-1668
Number of pages4
JournalProceedings of the IEEE Ultrasonics Symposium
Volume3
StatePublished - Dec 1 1994
EventProceedings of the 1994 IEEE Ultrasonics Symposium. Part 1 (of 3) - Cannes, Fr
Duration: Nov 1 1994Nov 4 1994

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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