Perpendicular ultrasound velocity measurement by 2D cross correlation of RF data. Part A: validation in a straight tube |
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Authors: | Bart Beulen Nathalie Bijnens Marcel Rutten Peter Brands Frans van de Vosse |
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Institution: | (1) Section Cardiovascular Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands;(2) ESAOTE Europe, PO Box 1132, 6201 BC Maastricht, The Netherlands |
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Abstract: | An ultrasound velocity assessment technique was validated, which allows the estimation of velocity components perpendicular
to the ultrasound beam, using a commercially available ultrasound scanner equipped with a linear array probe. This enables
the simultaneous measurement of axial blood velocity and vessel wall position, rendering a viable and accurate flow assessment.
The validation was performed by comparing axial velocity profiles as measured in an experimental setup to analytical and computational
fluid dynamics calculations. Physiologically relevant pulsating flows were considered, employing a blood analog fluid, which
mimics both the acoustic and rheological properties of blood. In the core region (|r|/a < 0.9), an accuracy of 3 cm s−1 was reached. For an accurate estimation of flow, no averaging in time was required, making a beat to beat analysis of pulsating
flows possible. |
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