Title :
Piezoelectric transducers for medical ultrasonic imaging
Author_Institution :
Hewlett-Packard Co., Andover, MA, USA
fDate :
30 Aug-2 Sep 1992
Abstract :
The requirements of a transducer for diagnostic applications are illustrated with specific examples, and the material parameters that influence transducer design are discussed. The current status of piezoelectric transducer design and common approaches taken to improve the design are also presented. The acoustic and electrical impedance criteria that must be satisfied in order to design an ultrasonic transducer with broad bandwidth response are described. It is pointed out that the development over the past decade of several different types of composite materials, PVDF (polyvinylidene fluoride) based copolymers, piezoelectric ceramics with low transverse coupling, and electrostrictive materials offers opportunities to overcome some of the compromises involved in transducer design
Keywords :
acoustic imaging; biomedical equipment; biomedical ultrasonics; piezoelectric transducers; PVDF; acoustic impedance; broad bandwidth response; copolymers; diagnostic applications; electrical impedance; electrostrictive materials; low transverse coupling; medical ultrasonic imaging; piezoelectric ceramics; piezoelectric transducers; polyvinylidene fluoride; transducer design; Acoustic transducers; Biomedical acoustics; Biomedical imaging; Biomedical transducers; Composite materials; Impedance; Medical diagnostic imaging; Piezoelectric transducers; Ultrasonic imaging; Ultrasonic transducers;
Conference_Titel :
Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on
Conference_Location :
Greenville, SC
Print_ISBN :
0-7803-0465-9
DOI :
10.1109/ISAF.1992.300680
