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Proceedings Paper

Volumetric synthetic aperture imaging with a piezoelectric 2D row-column probe
Author(s): Hamed Bouzari; Mathias Engholm; Thomas Lehrmann Christiansen; Christopher Beers; Anders Lei; Matthias Bo Stuart; Svetoslav Ivanov Nikolov; Erik Vilain Thomsen; Jørgen Arendt Jensen
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Paper Abstract

The synthetic aperture (SA) technique can be used for achieving real-time volumetric ultrasound imaging using 2-D row-column addressed transducers. This paper investigates SA volumetric imaging performance of an in-house prototyped 3 MHz λ/2-pitch 62+62 element piezoelectric 2-D row-column addressed transducer array. Utilizing single element transmit events, a volume rate of 90 Hz down to 14 cm deep is achieved. Data are obtained using the experimental ultrasound scanner SARUS with a 70 MHz sampling frequency and beamformed using a delay-and-sum (DAS) approach. A signal-to-noise ratio of up to 32 dB is measured on the beamformed images of a tissue mimicking phantom with attenuation of 0.5 dB cm-1 MHz-1, from the surface of the probe to the penetration depth of 300λ. Measured lateral resolution as Full-Width-at-Half-Maximum (FWHM) is between 4λ and 10λ for 18% to 65% of the penetration depth from the surface of the probe. The averaged contrast is 13 dB for the same range. The imaging performance assessment results may represent a reference guide for possible applications of such an array in different medical fields.

Paper Details

Date Published: 1 April 2016
PDF: 9 pages
Proc. SPIE 9790, Medical Imaging 2016: Ultrasonic Imaging and Tomography, 97900Y (1 April 2016); doi: 10.1117/12.2216074
Show Author Affiliations
Hamed Bouzari, Technical Univ. of Denmark (Denmark)
Mathias Engholm, Technical Univ. of Denmark (Denmark)
Thomas Lehrmann Christiansen, Technical Univ. of Denmark (Denmark)
Christopher Beers, Sound Technology, Inc. (United States)
Anders Lei, Technical Univ. of Denmark (Denmark)
Matthias Bo Stuart, Technical Univ. of Denmark (Denmark)
Svetoslav Ivanov Nikolov, BK Ultrasound ApS (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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