Conference paper
3-D Vector Flow Using a Row-Column Addressed CMUT Array
Department of Electrical Engineering, Technical University of Denmark1
Biomedical Engineering, Department of Electrical Engineering, Technical University of Denmark2
Department of Micro- and Nanotechnology, Technical University of Denmark3
MEMS-AppliedSensors, Department of Micro- and Nanotechnology, Technical University of Denmark4
Sound Technology, Inc.5
BK Medical ApS6
Center for Fast Ultrasound Imaging, Centers, Technical University of Denmark7
This paper presents an in-house developed 2-D capacitive micromachined ultrasonic transducer (CMUT) appliedfor 3-D blood flow estimation. The probe breaks with conventional transducers in two ways; first, the ultrasonicpressure field is generated from thousands of small vibrating micromachined cells, and second, elements areaccessed by row and/or column indices.
The 62+62 2-D row-column addressed prototype CMUT probe was usedfor vector flow estimation by transmitting focused ultrasound into a flow-rig with a fully developed parabolicflow. The beam-to-flow angle was 90◦. The received data was beamformed and processed offline. A transverseoscillation (TO) velocity estimator was used to estimate the 3-D vector flow along a line originating from thecenter 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 0.48m/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 feasiblefor 3-D flow estimation
Language: | English |
---|---|
Publisher: | SPIE - International Society for Optical Engineering |
Year: | 2016 |
Pages: | 979005-979005-8 |
Proceedings: | SPIE Medical Imaging 2016 |
ISBN: | 9781510600256 |
ISSN: | 24109045 , 16057422 , 1996756x and 0277786x |
Types: | Conference paper |
DOI: | 10.1117/12.2216721 |
ORCIDs: | Holbek, Simon , Engholm, Mathias , Lei, Anders , Stuart, Matthias Bo , Thomsen, Erik Vilain and Jensen, Jørgen Arendt |