3D vector flow using a row-column addressed CMUT array

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

doi:10.1117/12.2216721

1 April 2016 3D vector flow using a row-column addressed CMUT array

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

Author Affiliations +

Proceedings Volume 9790, Medical Imaging 2016: Ultrasonic Imaging and Tomography; 979005 (2016) https://doi.org/10.1117/12.2216721
Event: SPIE Medical Imaging, 2016, San Diego, California, United States

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.

Citation Download Citation

Simon Holbek, Thomas Lehrmann Christiansen, Mathias Engholm, Anders Lei, Mathias Bo Stuart, Christopher Beers, Lars Nordahl Moesner, Jan Peter Bagge, Erik Vilain Thomsen, and 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); https://doi.org/10.1117/12.2216721

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