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Proceedings Paper

In vitro high-frame-rate contrast-enhanced ultrasound particle image velocimetry in a carotid artery stent
Author(s): Astrid M. Hoving; Jason Voorneveld; Evelien E. de Vries; Erik Groot Jebbink; Michel Versluis; Johan G. Bosch; Nico de Jong; Julia Mikhal; Gert J. de Borst; Cornelis H. Slump
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Paper Abstract

Introduction: To improve carotid artery stenting (CAS), more information about the functioning of the stent is needed. Therefore, a method that can image the flow near and around a stent is required. The aim of this study was to evaluate the performance of high-frame-rate contrast-enhanced ultrasound (HFR CEUS) in the presence of a stent. Methodology: HFR CEUS acquisitions of a carotid artery phantom, a silicone tube with diameter 8 mm, with and without a stent were acquired at transmit voltages of 2V, 4V and 10V using a Verasonics ultrasound system and C5-2 probe. Different concentrations of ultrasound contrast agent (UCA) were tested in a blood mimicking fluid (BMF). Particle image velocimetry (PIV) analysis was performed on Singular Value Decomposition (SVD) filtered images. Mean and peak velocities, and correlation coefficients were compared between stented and non-stented regions. Also, experimental results were compared with theoretical and numerical models. Results: The averaged experimental mean velocity (0.113 m/s) was significant lower than the theoretical and numerical mean velocity (0.129 m/s). The averaged experimental peak velocity (0.152 m/s) was significant lower than the theoretical and numerical peak velocity (0.259 m/s). Correlation coefficients and averaged mean velocity values were lower (difference of 0.022 m/s) in stented regions compared to non-stented regions. Conclusion: In vitro experiments showed an underestimation of mean and peak velocities in stented regions compared to non-stented regions. However, the microbubbles can be tracked efficiently and the expected laminar flow profile can be quantified using HFR CEUS near and around a stent.

Paper Details

Date Published: 6 March 2018
PDF: 13 pages
Proc. SPIE 10580, Medical Imaging 2018: Ultrasonic Imaging and Tomography, 105800A (6 March 2018); doi: 10.1117/12.2293669
Show Author Affiliations
Astrid M. Hoving, Univ. Twente (Netherlands)
Univ. Medical Ctr. Utrecht (Netherlands)
Jason Voorneveld, Erasmus MC (Netherlands)
Evelien E. de Vries, Univ. Medical Ctr. Utrecht (Netherlands)
Erik Groot Jebbink, Univ. Twente (Netherlands)
Michel Versluis, Univ. Twente (Netherlands)
Johan G. Bosch, Erasmus MC (Netherlands)
Nico de Jong, Erasmus MC (Netherlands)
Julia Mikhal, Univ. Twente (Netherlands)
Gert J. de Borst, Univ. Medical Ctr. Utrecht (Netherlands)
Cornelis H. Slump, Univ. Twente (Netherlands)

Published in SPIE Proceedings Vol. 10580:
Medical Imaging 2018: Ultrasonic Imaging and Tomography
Neb Duric; Brett C. Byram, Editor(s)

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