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Proceedings Paper

3D vector flow using a row-column addressed CMUT array
Author(s): Simon Holbek; Thomas Lehrmann Christiansen; Mathias Engholm; Anders Lei; Mathias Bo Stuart; Christopher Beers; Lars Nordahl Moesner; Jan Peter Bagge; Erik Vilain Thomsen; Jørgen Arendt Jensen
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Paper 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.

Paper Details

Date Published: 1 April 2016
PDF: 8 pages
Proc. SPIE 9790, Medical Imaging 2016: Ultrasonic Imaging and Tomography, 979005 (1 April 2016); doi: 10.1117/12.2216721
Show Author Affiliations
Simon Holbek, Technical Univ. of Denmark (Denmark)
Thomas Lehrmann Christiansen, Technical Univ. of Denmark (Denmark)
Mathias Engholm, Technical Univ. of Denmark (Denmark)
Anders Lei, Technical Univ. of Denmark (Denmark)
Mathias Bo Stuart, Technical Univ. of Denmark (Denmark)
Christopher Beers, Sound Technology, Inc. (United States)
Lars Nordahl Moesner, BK Ultrasound (Denmark)
Jan Peter Bagge, BK Ultrasound (Denmark)
Erik Vilain Thomsen, Technical Univ. of Denmark (Denmark)
Jørgen Arendt Jensen, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 9790:
Medical Imaging 2016: Ultrasonic Imaging and Tomography
Neb Duric; Brecht Heyde, Editor(s)

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