Archives of Acoustics, 19, 4, pp. 435-449, 1994

High-frequency Doppler ultrasound flowmeter

A. NOWICKI
Ultrasonic Department, Institute of Fundamental Technological Research, Polish Academy of Sciences
Poland

W. SECOMSKI
Ultrasonic Department, Institute of Fundamental Technological Research, Polish Academy of Sciences
Poland

P. KARŁOWICZ
Ultrasonic Department, Institute of Fundamental Technological Research, Polish Academy of Sciences
Poland

G. ŁYPACEWICZ
Ultrasonic Department, Institute of Fundamental Technological Research, Polish Academy of Sciences
Poland

This paper discusses a new Doppler device for measuring blood flow in small vessels. The ultrasound frequency applied is 20M Hz. Two different ultrasound probes were designed with transducer diameters of 0.9 mm and 1.6 mm. The transducers were located at the point of a catheter. As measured at 1.5 mm depth, the lateral resolutions were 1 mm and 1.7 mm, respectively. The flowmeter is very sensitive. Compared with standard flowmeters (from 2 to 8 MHz), signals from subcutaneous vessels are greater by 10-20 dB.
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Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).

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