A general-purpose computer program for studying ultrasonic beam patterns generated with acoustic lenses

Author

Roberti, Dino ; Ludwig, Reinhold ; Looft, Fred J.

Author_Institution

Dept. of Electr. Eng., Worcester Polytech. Inst., MA, USA

Volume

37

Issue

1

fYear

1988

fDate

3/1/1988 12:00:00 AM

Firstpage

90

Lastpage

94

Abstract

A 3-D computer model of a piston radiator with lenses for focusing and defocusing is presented. To achieve high-resolution imaging, the frequency of the transmitted and received ultrasound must be as high as 10 MHz. Current ultrasonic transducers produce an extremely narrow beam at these high frequencies and thus are not appropriate for imaging schemes such as synthetic-aperture focus techniques (SAFT). Consequently, a numerical analysis program has been developed to determine field intensity patterns that are radiated from ultrasonic transducers with lenses. Lens shapes are described and the field intensities are numerically predicted and compared with experimental results

Keywords

acoustic imaging; acoustic radiators; computerised signal processing; focusing; lenses; numerical analysis; ultrasonic transducers; 10 MHz; 3-D computer model; acoustic lenses; computerised signal processing; defocusing; field intensity patterns; focusing; general-purpose computer program; high-resolution imaging; numerical analysis; piston radiator; synthetic-aperture focus techniques; ultrasonic beam patterns; ultrasonic transducers; Acoustic beams; Acoustic imaging; Acoustic transducers; Focusing; Frequency; Image resolution; Lenses; Structural beams; Ultrasonic imaging; Ultrasonic transducers;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.2671

Filename

2671