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Proceedings Paper

Rapidly-steered single-element ultrasound for real-time volumetric imaging and guidance
Author(s): Mark Stauber; Craig Western; Roman Solek; Kenneth Salisbury; Dmitre Hristov; Jeffrey Schlosser
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Paper Abstract

Volumetric ultrasound (US) imaging has the potential to provide real-time anatomical imaging with high soft-tissue contrast in a variety of diagnostic and therapeutic guidance applications. However, existing volumetric US machines utilize "wobbling" linear phased array or matrix phased array transducers which are costly to manufacture and necessitate bulky external processing units. To drastically reduce cost, improve portability, and reduce footprint, we propose a rapidly-steered single-element volumetric US imaging system. In this paper we explore the feasibility of this system with a proof-of-concept single-element volumetric US imaging device. The device uses a multi-directional raster-scan technique to generate a series of two-dimensional (2D) slices that were reconstructed into three-dimensional (3D) volumes. At 15 cm depth, 90° lateral field of view (FOV), and 20° elevation FOV, the device produced 20-slice volumes at a rate of 0.8 Hz. Imaging performance was evaluated using an US phantom. Spatial resolution was 2.0 mm, 4.7 mm, and 5.0 mm in the axial, lateral, and elevational directions at 7.5 cm. Relative motion of phantom targets were automatically tracked within US volumes with a mean error of -0.3±0.3 mm, -0.3±0.3 mm, and -0.1±0.5 mm in the axial, lateral, and elevational directions, respectively. The device exhibited a mean spatial distortion error of 0.3±0.9 mm, 0.4±0.7 mm, and -0.3±1.9 in the axial, lateral, and elevational directions. With a production cost near $1000, the performance characteristics of the proposed system make it an ideal candidate for diagnostic and image-guided therapy applications where form factor and low cost are paramount.

Paper Details

Date Published: 18 March 2016
PDF: 6 pages
Proc. SPIE 9786, Medical Imaging 2016: Image-Guided Procedures, Robotic Interventions, and Modeling, 97862E (18 March 2016); doi: 10.1117/12.2216290
Show Author Affiliations
Mark Stauber, Stanford Univ. (United States)
Craig Western, SpaceX (United States)
Roman Solek, Interson Corp. (United States)
Kenneth Salisbury, Stanford Univ. (United States)
Dmitre Hristov, Stanford Univ. Medical Ctr. (United States)
Jeffrey Schlosser, Sonitrack Systems (United States)

Published in SPIE Proceedings Vol. 9786:
Medical Imaging 2016: Image-Guided Procedures, Robotic Interventions, and Modeling
Robert J. Webster III; Ziv R. Yaniv, Editor(s)

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