3-D Vector Flow Using a Row-Column Addressed CMUT Array

Simon Holbek, Thomas Lehrmann Christiansen, Mathias Engholm, Anders Lei, Matthias Bo Stuart, Christopher Beers, Lars Nordahl Moesner, Jan Peter Bagge, Erik Vilain Thomsen, Jørgen Arendt Jensen

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Abstract

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
Original languageEnglish
Title of host publicationProceedings of SPIE
EditorsNeb Duric, Brecht Heyde
Number of pages8
Volume9790
PublisherSPIE - International Society for Optical Engineering
Publication date2016
Article number979005
DOIs
Publication statusPublished - 2016
EventSPIE Medical Imaging 2016 : Ultrasonic Imaging and Tomography - Town & Country Resort and Convention Cente, San Diego, United States
Duration: 27 Feb 20163 Mar 2016
Conference number: 9790
https://spie.org/MI/conferencedetails/ultrasonic-imaging

Conference

ConferenceSPIE Medical Imaging 2016
Number9790
LocationTown & Country Resort and Convention Cente
CountryUnited States
CitySan Diego
Period27/02/201603/03/2016
Internet address

Keywords

  • 3-D Vector Flow
  • Row-Column Array
  • CMUT
  • Medical Ultrasound

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