Title :
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
fDate :
29 Oct-1 Nov 1998
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;
Conference_Titel :
Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE
Conference_Location :
Hong Kong
Print_ISBN :
0-7803-5164-9
DOI :
10.1109/IEMBS.1998.746943
