Ultrasound Med Biol. 2008 May;34(5):760-74. Epub 2008 Mar 4.

A method to estimate wall shear rate with a clinical ultrasound scanner.

Blake JR, Meagher S, Fraser KH, Easson WJ, Hoskins PR.

Source

Medical Physics, The University of Edinburgh, Edinburgh, UK. james.blake@ed.ac.uk

Abstract

A simple technique to estimate the wall shear rate in healthy arteries using a clinical ultrasound scanner has been developed. This method uses the theory of fully developed oscillatory flow together with a spectral Doppler trace and an estimate of mean arterial diameter. A method using color flow imaging was compared with the spectral Doppler method in vascular phantoms and found to have errors that were on average 35% greater. Differences from the theoretic value for the time averaged wall shear rate using the spectral Doppler method varied by artery: brachial -9 (1) %; carotid -7 (1) %; femoral -22 (4) %; and fetal aorta -17 (10) %. Test measurements obtained from one healthy volunteer demonstrated the feasibility of the technique in vivo.

PMID:: 18295392; [PubMed - indexed for MEDLINE]

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