A guided acoustic wave method for characterization of medical ultrasound transducers

Author

Zhang, Rui ; Wan, Mingxi ; Cao, Wenwu

Author_Institution

Dept. of Biomed. Eng., Xi´´an Jiaotong Univ., China

Volume

4

fYear

1998

fDate

29 Oct-1 Nov 1998

Firstpage

1816

Abstract

A guided acoustic wave technique for nondestructive evaluation (NDE) of the medical ultrasound transducers is presented. A revised reflection coefficient measurement technique is used to obtain the dispersion curves of the Lamb waves by finding the local minimum of the broad band reflection spectrum. A set of specimens with controlled interface conditions between the matching layer and the piezoelectric layer are tested. The results of experiment show there is strong relation between the position of the turning point in the lowest order mode dispersion curve and bond quality of transducers

Keywords

biomedical transducers; biomedical ultrasonics; surface acoustic waves; ultrasonic reflection; ultrasonic transducers; Lamb waves; broad band reflection spectrum local minimum; guided acoustic wave method; lowest order mode dispersion curve; matching layer; medical ultrasound transducers characterization; nondestructive evaluation; piezoelectric layer; revised reflection coefficient measurement technique; transducer bond quality; turning point position; Acoustic reflection; Acoustic transducers; Acoustic waves; Biomedical transducers; Dispersion; Measurement techniques; Piezoelectric transducers; Testing; Ultrasonic imaging; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE

Conference_Location

Hong Kong

ISSN

1094-687X

Print_ISBN

0-7803-5164-9

Type

conf

DOI

10.1109/IEMBS.1998.746943

Filename

746943