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Proceedings Paper

Preliminary investigation of an ultrasound method for estimating pressure changes in deep-positioned vessels
Author(s): Jacob Bjerring Olesen; Carlos Armando Villagomez-Hoyos; Marie Sand Traberg; Adrian J. Y. Chee; Billy Y. S. Yiu; Chung Kit Ho; Alfred C. H. Yu; Jørgen Arendt Jensen
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Paper Abstract

This paper presents a method for measuring pressure changes in deep-tissue vessels using vector velocity ultrasound data. The large penetration depth is ensured by acquiring data using a low frequency phased array transducer. Vascular pressure changes are then calculated from 2-D angle-independent vector velocity fields using a model based on the Navier-Stokes equations. Experimental scans are performed on a fabricated flow phantom having a constriction of 36% at a depth of 100 mm. Scans are carried out using a phased array transducer connected to the experimental scanner, SARUS. 2-D fields of angle-independent vector velocities are acquired using directional synthetic aperture vector flow imaging. The obtained results are evaluated by comparison to a 3-D numerical simulation model with equivalent geometry as the designed phantom. The study showed pressure drops across the constricted phantom varying from -40 Pa to 15 Pa with a standard deviation of 32%, and a bias of 25% found relative to the peak simulated pressure drop. This preliminary study shows that pressure can be estimated non-invasively to a depth that enables cardiac scans, and thereby, the possibility of detecting the pressure drops across the mitral valve.

Paper Details

Date Published: 1 April 2016
PDF: 6 pages
Proc. SPIE 9790, Medical Imaging 2016: Ultrasonic Imaging and Tomography, 97900J (1 April 2016); doi: 10.1117/12.2214974
Show Author Affiliations
Jacob Bjerring Olesen, Technical Univ. of Denmark (Denmark)
Carlos Armando Villagomez-Hoyos, Technical Univ. of Denmark (Denmark)
Marie Sand Traberg, Technical Univ. of Denmark (Denmark)
Adrian J. Y. Chee, Univ. of Hong Kong (Hong Kong, China)
Billy Y. S. Yiu, Univ. of Hong Kong (Hong Kong, China)
Chung Kit Ho, Univ. of Hong Kong (Hong Kong, China)
Alfred C. H. Yu, Univ. of Waterloo (Canada)
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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