Evaluation of a nondiffracting transducer for tissue characterization

Author

Lu, Jian-Yu ; Greenleaf, James F.

Author_Institution

Dept. of Physiol. & Biophys., Mayo Clinic, Rochester, MN, USA

fYear

1990

fDate

4-7 Dec 1990

Firstpage

795

Abstract

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

Keywords

backscatter; bioacoustics; biomedical ultrasonics; liver; ultrasonic scattering; ultrasonic transducers; Bessel nondiffracting beam; backscatter coefficients; excised human liver samples; nondiffracting transducer; one-dimensional Fourier transforms; one-dimensional integrations; tissue characterization; tissue equivalent phantom; ultrasonic transducer; Acoustic beams; Acoustic diffraction; Acoustic pulses; Acoustic scattering; Acoustic transducers; Backscatter; Focusing; Optical scattering; Ultrasonic imaging; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1990. Proceedings., IEEE 1990

Conference_Location

Honolulu, HI

Type

conf

DOI

10.1109/ULTSYM.1990.171474

Filename

171474