Jpn. J. Appl. Phys. 24 (1985) Supplement 24-1 pp. 55-57  |Previous Article| |Next Article|  |Table of Contents|
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5th Symp. Ultrasonic Electronics, Tokyo, 1984

Radiation of Ultrasonic Impulse by Pseudo-Inverse Filtering in DFT Domain

Nobuyuki Endoh, Atsuhiko Takase, Shinji Nishiyama and Yoshiroh Kawakami

(Received December 5, 1984)

A radiation method is described which uses a pseudo-inverse filtering in DFT domain. A short ultrasonic pulse.such as a one cycle sinusoidal wave can be radiated using an ordinary PZT transducer. Experiments are carried out in both the transmission system and the pulse echo system. A clear direct pulse of 2 MHz without ringing is received by this method. Also obtained are one cycle sinusoidal echo pulses of a plate. The frequency dependent attenuation is compensated in the media. The experimental results confirm the validity of this method, making it seem applicable to ultrasonic diagnosis.

URL: http://jjap.jsap.jp/link?JJAPS/24S1/55/