Effects of ultrasonic attenuation on the accuracy of the blood flow measurement technique utilizing time domain correlation

V. T. Suorsa, W. D. O'Brien

Research output: Contribution to journalConference articlepeer-review

Abstract

It is shown that time domain correlation can be used to estimate the volumetric flow in a vessel accurately without deteriorating effects due to the frequency-dependent attenuation of ultrasound. When the transmitted pulses are separated by a certain time and are reflected by the moving scatterers within the ultrasound beam, the time difference between the pulses changes. The observed time shift is directly related to the radial speed (relative to the beam axis) of the scatterers. If the flow velocity is sampled at different positions across the vessel, then the volume flow rate can be calculated. The time domain technique has been verified in a blood flow phantom using a blood mimicking substance and natural sponge as the attenuating medium beween the transducer and the vessel. For hydrodynamically determined flow rates from 50 to 560 ml/min, the continuous volumetric flow has been ultrasonically assessed with an accuracy better than 21%.

Original languageEnglish (US)
Pages (from-to)989-994
Number of pages6
JournalUltrasonics Symposium Proceedings
Volume2
StatePublished - Dec 1 1988
Externally publishedYes
EventIEEE 1988 Ultrasonics Symposium - Proceedings - Chicago, IL, USA
Duration: Oct 2 1988Oct 5 1988

ASJC Scopus subject areas

  • Engineering(all)

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