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Acoustic Streaming in Biological Fluids Measured Using an Ultrasonic Doppler Technique (CROSBI ID 738808)

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Starritt, Hazel ; Duck, Francis ; Žauhar, Gordana Acoustic Streaming in Biological Fluids Measured Using an Ultrasonic Doppler Technique. 1997. str. 71-71-x

Podaci o odgovornosti

Starritt, Hazel ; Duck, Francis ; Žauhar, Gordana

engleski

Acoustic Streaming in Biological Fluids Measured Using an Ultrasonic Doppler Technique

The aim was to investigate acoustic streaming in biological fluids. Little is known about this effect although it is important for safety reasons and potentially as a diagnostic tool. Fluids were insonated using 3.5 MHz single element transducer in pulsed mode with a total acoustic power of 150 mW. Streaming was detected using a 8 MHz continious wave Doppler system and the maximum velocity was obtained by spectral analysis of the Doppler signal. Axial profiles were measured for propagation (a) through water plus 3 cm of test fluid and (b) purely in test fluid. For each fluid the harmonic content in the acoustic pulse was assesed using a pvd needle hydrophone. The maximum streaming velocity in the water was 8.2 cms^-1. In the fluid samples plus water, the maximum velocities were 5.8 cms^-1 in 4.5% human serum Albumen (HSA) and 4.7 cms^-1 in blood. Velocities were similar in HSA alone but lower in blood. Using a commercial Duplex scanner, streaming was generated and detected in blood and HSA. Maximum streaming velocities are lower in biological fluids than in water, in spite of its low attenuation. This is due in part to reduced harmonic generation in these fluids compared with water.

streaming; ultrasound; blood; doppler

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Podaci o prilogu

71-71-x.

1997.

nije evidentirano

objavljeno

Podaci o matičnoj publikaciji

Podaci o skupu

Nepoznat skup

ostalo

29.02.1904-29.02.2096

Povezanost rada

Fizika