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Proceedings Paper

Transverse oscillation vector flow imaging for transthoracic echocardiography
Author(s): David Pierson Bradway; Kristoffer Lindskov Hansen M.D.; Michael Bachmann Nielsen M.D.; Jørgen Arendt Jensen
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Paper Abstract

This work presents the development and first results of in vivo transthoracic cardiac imaging using an implementation of Vector Flow Imaging (VFI) via the Transverse Oscillation (TO) method on a phased-array transducer. Optimal selection of the lateral wavelength of the transversely-oscillating receive field is described, and results from Field II simulations are presented. Measurements are made using the SARUS experimental ultrasound scanner driving an intercostal phased-array probe. The acquisition sequence was composed of interleaved frames of 68-line B-mode and 17-direction, 32-shot vector velocity flow images. A flow pump was programmed for constant flow for in vitro acquisitions at varying depths in a tissue-mimicking fluid. Additionally, mitral, aortic, and tricuspid valves of two healthy volunteers were scanned from intercostal acoustic windows. The acquired RF data were beam-formed via the TO method, and fourth-order estimators were employed for the velocity estimation. The resulting images were compared with those from conventional spectral Doppler and color flow mapping sequences. VFI is shown to be a clinically-feasible tool, which enables new flexibility for choosing acoustic windows, visualizing turbulent flow patterns, and measuring velocities.

Paper Details

Date Published: 17 March 2015
PDF: 7 pages
Proc. SPIE 9419, Medical Imaging 2015: Ultrasonic Imaging and Tomography, 941902 (17 March 2015); doi: 10.1117/12.2081145
Show Author Affiliations
David Pierson Bradway, Technical Univ. of Denmark (Denmark)
Kristoffer Lindskov Hansen M.D., Copenhagen Univ. Hospital Rigshopitalet (Denmark)
Michael Bachmann Nielsen M.D., Copenhagen Univ. Hospital Rigshopitalet (Denmark)
Jørgen Arendt Jensen, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 9419:
Medical Imaging 2015: Ultrasonic Imaging and Tomography
Johan G. Bosch; Neb Duric, Editor(s)

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