Artery Research

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Volume 20, Issue C, December 2017, Pages 76 - 77

P84 HIGH-FRAME RATE VECTOR FLOW IMAGING: RELATIONSHIP BETWEEN CAROTID BIFURCATION GEOMETRY AND FLOW PATTERNS

Authors
A. Alfredo Goddi1, L. Luca Aiani1, Y. Yigang Du2, X. Xujin He2, Y. Yingying Shen2, L. Lei Zhu2
1Centro Medico SME – Diagnostica per Immagini (SME Medical Center – Diagnostic Imaging), Varese, Italy
2Shenzhen Mindray Bio-Medical Electronics Co. Ltd., Shenzhen, China
Available Online 6 December 2017.
DOI
10.1016/j.artres.2017.10.100How to use a DOI?
Abstract

Background: The laminar flow movement in straight arteries is affected by anatomical factors such as bifurcation, lumen diameter changes or plaques. As a consequence of the local deceleration, the detachment of the boundary layer from the wall develops a disturbed flow, which impacts hemodynamics. It results in a non-uniform distribution of wall shear stress (WSS), which is responsible for atherosclerosis [1]. This phenomenon usually occurs in the carotid bifurcation (CB). Computational methods, MRI and conventional Doppler techniques have been used to establish the correlations between flow disturbance and plaque formation. We propose the use of a new method, called high-frame rate Vector Flow imaging (VFI), which dynamically visualises blood flow velocities in all directions, in the evaluation of the flow characteristics in the CB [2,3,4,5].

Methods: CB geometries and flow patterns in 30 healthy subjects of different age were evaluated using a commercial system equipped with high-frame rate VFI based on a frame rate of 600 Hz. The flow is represented by many coloured vectors, displayed as arrows, showing the different velocity, magnitude and direction at each site.

Results: The correlation between flow disturbances and carotid sinus diameter was confirmed: the more relevant the diameter, the more disturbed the flow. Different CB geometries, affecting the flow behaviours and generating complex flow, such as recirculation, counter eddy, vortex and helical trajectory, were identified (Fig 1).

Conclusions: High-frame rate VFI shows in detail the spatiotemporal characteristics of the flow and demonstrates the strong effect of vessel geometries on the flow patterns.

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This is an open access article distributed under the CC BY-NC license.

References

1.HF Younis, MR Kaazempur-Mofrad, RC Chan, et al., Hemodynamics and wall mechanics in human carotid bifurcation and its consequences for atherogenesis: investigation of inter-individual variation, Biomech Model Mechanobiol, Vol. 3, 2004, pp. 17-32.
2.BY Yiu, SS Lai, and AC Yu, Vector Projectile Imaging: Time-Resolved Dynamic Visualization of Complex Flow Patterns, Ultrasound Med Biol, Vol. 40, No. 9, 2014, pp. 2295-2309.
3.Y Du, R Fan, and Y Li, Ultrasonic imaging method and system. WO2015180069A1, 2015
4.A Goddi, M Fanizza, C Bortolotto, et al., Vector Flow Imaging techniques – A new way to study vessel flow with ultrasound, JCU, 21 Jul 2017. [Epub ahead of print]
5.A Goddi, C Bortolotto, I Fiorina, et al., High-frame rate vector flow imaging of the carotid bifurcation, Insights Imaging, Vol. 8, 2017, pp. 319.
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Journal
Artery Research
Volume-Issue
20 - C
Pages
76 - 77
Publication Date
2017/12/06
ISSN (Online)
1876-4401
ISSN (Print)
1872-9312
DOI
10.1016/j.artres.2017.10.100How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

risenwbib
TY  - JOUR
AU  - A. Alfredo Goddi
AU  - L. Luca Aiani
AU  - Y. Yigang Du
AU  - X. Xujin He
AU  - Y. Yingying Shen
AU  - L. Lei Zhu
PY  - 2017
DA  - 2017/12/06
TI  - P84 HIGH-FRAME RATE VECTOR FLOW IMAGING: RELATIONSHIP BETWEEN CAROTID BIFURCATION GEOMETRY AND FLOW PATTERNS
JO  - Artery Research
SP  - 76
EP  - 77
VL  - 20
IS  - C
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2017.10.100
DO  - 10.1016/j.artres.2017.10.100
ID  - Goddi2017
ER  -