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Evaluation of a nondiffracting transducer for tissue characterization

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2 Author(s)
Lu, J.-y. ; Dept. of Physiol. & Biophys., Mayo Clinic, Rochester, MN, USA ; Greenleaf, J.F.

The authors describe a method for estimating backscatter coefficients of excised human liver samples and the RMI413A tissue equivalent phantom, using the J0 Bessel nondiffracting transducer. A formula for the calculation of backscatter coefficients that requires only two one-dimensional integrations in addition to one-dimensional Fourier transforms is presented. This equation in combination with backscatter from a J0 Bessel nondiffracting beam results in the ability to calculate backscatter coefficients in real time. In addition, estimations of the backscatter coefficients are more distance-independent because of the nonspreading nature of the J0 Bessel nondiffracting beam. The present results compare well to those obtained by the conventional focused Gaussian beam transducer

Published in:

Ultrasonics Symposium, 1990. Proceedings., IEEE 1990

Date of Conference:

4-7 Dec 1990