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英文誌(2004-)

Journal of Medical Ultrasonics

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cover

1980 - Vol.7

Vol.7 No.04

State of the Art(特集)

(0365 - 0370)

高分子圧電膜トランスデューサとその応用

Piezoelectric Polymer Transducers and Their Applications in Ultrasound Echography

大東 弘二

Hiroji OHIGASHI

東レ㈱エンジニアリング研究所

Basic Research Laboratories, Toray Industries, Inc.

キーワード :

Polyvinylidene fluoride, a most promising piezoelectric polymer at present, has the unique advantages as ultrasonic transducer material - low acoustic impedance, flexibility and low dielectric permeability. This enables us to provide transducers having high resolution power for ultrasound imaging. In this paper, state-of-art in piezoelectric polymer transducers for medical ultrasound imaging are reviewed. Single element PVDF concave transducers (3.5 - 7.5MHz, 1/2 - 1 inch aperture) have been developed and proved to give higher quality images compared with conventional ceramic transducers. Potential application to linear array and more elaborated transducers, and the limitation of piezoelectric polymers are discussed.