1 April 2016 3D vector flow using a row-column addressed CMUT array
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Abstract
This paper presents an in-house developed 2-D capacitive micromachined ultrasonic transducer (CMUT) applied for 3-D blood flow estimation. The probe breaks with conventional transducers in two ways; first, the ultrasonic pressure field is generated from thousands of small vibrating micromachined cells, and second, elements are accessed by row and/or column indices. The 62+62 2-D row-column addressed prototype CMUT probe was used for vector flow estimation by transmitting focused ultrasound into a flow-rig with a fully developed parabolic flow. The beam-to-flow angle was 90°. The received data was beamformed and processed offline. A transverse oscillation (TO) velocity estimator was used to estimate the 3-D vector flow along a line originating from the center of the transducer. The estimated velocities in the lateral and axial direction were close to zero as expected. In the transverse direction a characteristic parabolic velocity profile was estimated with a peak velocity of 0.48 m/s ± 0.02 m/s in reference to the expected 0.54 m/s. The results presented are the first 3-D vector flow estimates obtained with a row-column CMUT probe, which demonstrates that the CMUT technology is feasible for 3-D flow estimation.
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Simon Holbek, Simon Holbek, Thomas Lehrmann Christiansen, Thomas Lehrmann Christiansen, Mathias Engholm, Mathias Engholm, Anders Lei, Anders Lei, Mathias Bo Stuart, Mathias Bo Stuart, Christopher Beers, Christopher Beers, Lars Nordahl Moesner, Lars Nordahl Moesner, Jan Peter Bagge, Jan Peter Bagge, Erik Vilain Thomsen, Erik Vilain Thomsen, Jørgen Arendt Jensen, Jørgen Arendt Jensen, } "3D vector flow using a row-column addressed CMUT array", Proc. SPIE 9790, Medical Imaging 2016: Ultrasonic Imaging and Tomography, 979005 (1 April 2016); doi: 10.1117/12.2216721; https://doi.org/10.1117/12.2216721
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