Non-invasive Estimation of Pressure Changes along a Streamline using Vector Velocity Ultrasound

Jacob Bjerring Olesen, Carlos Armando Villagómez Hoyos, Marie Sand Traberg, Jørgen Arendt Jensen

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Abstract

A non-invasive method for estimating pressure changes along a streamline using ultrasound is presented. The suggested method estimates pressure gradients from 2-D vector velocity fields. Changes in pressure are derived using a model based on the Navier-Stokes equations. Scans of a carotid bifurcation phantom with a 70% constriction are performed using a linear array transducer connected to the experimental scanner, SARUS. 2-D fields of angle-independent vector velocities are acquired to a depth of 3 cm using directional synthetic aperture vector flow imaging. The performance of the suggested estimator is evaluated by comparing its results to a 3-D numerical simulation model. The study showed pressure drops across the constricted phantom varying from -5 Pa to 7 Pa with a standard deviation of 4%. The proposed method had a normalised rootmean-square error of 10% in reference to the simulation model. Further, an in-vivo scan of the carotid bifurcation is made to show the feasibility of the technique in a less experimental environment
Original languageEnglish
Title of host publicationProceedings of 2015 IEEE International Ultrasonics Symposium.
Number of pages4
PublisherIEEE
Publication date2015
ISBN (Print)978-1-4799-8182-3
DOIs
Publication statusPublished - 2015
Event2015 IEEE International Ultrasonics Symposium - Taipei, Taiwan, Province of China
Duration: 21 Oct 201524 Oct 2015

Conference

Conference2015 IEEE International Ultrasonics Symposium
CountryTaiwan, Province of China
CityTaipei
Period21/10/201524/10/2015

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