4D flow MRI and CFD simulations of pulsatile flow in a phantom model of arterial stenosis: visualizing the vortex dynamics

Amirkhosro Kazemi; Ruponti Nath; M. J. Negahdar; Marcus Stodddard; Amir A. Amini

doi:10.1117/12.2582312

15 February 2021 4D flow MRI and CFD simulations of pulsatile flow in a phantom model of arterial stenosis: visualizing the vortex dynamics

Amirkhosro Kazemi, Ruponti Nath, M. J. Negahdar, Marcus Stodddard, Amir A. Amini

Author Affiliations +

Proceedings Volume 11600, Medical Imaging 2021: Biomedical Applications in Molecular, Structural, and Functional Imaging; 116001H (2021) https://doi.org/10.1117/12.2582312
Event: SPIE Medical Imaging, 2021, Online Only

Abstract

We compared steady and pulsatile CFD simulations with 4D Flow MRI in a phantom model of arterial stenosis and investigated the hemodynamic features distal to the occlusion. With CFD, we characterized the flow structure to estimate both the magnitude and degree of anisotropy of the turbulence-related indices including vorticity, wall shear stress, helicity, and swirling strength using Large-Eddy Simulation (LES) and Reynolds-Averaged Navier Stocks (RANS) method. The results revealed that the LES approach captures well both the overall and the detailed ow features in comparison to RANS predictions with the standard k-epsilon model when compared with 4D Flow MRI. Furthermore, the Q-criterion was employed to reveal the temporal evolution of the vortex ring which was observed distal to the stenotic narrowing. It was found that both RANS and LES simulations were highly accurate for wall shear stress when validated against 4D Flow MR Imaging.

Conference Presentation

Citation Download Citation

Amirkhosro Kazemi, Ruponti Nath, M. J. Negahdar, Marcus Stodddard, and Amir A. Amini "4D flow MRI and CFD simulations of pulsatile flow in a phantom model of arterial stenosis: visualizing the vortex dynamics", Proc. SPIE 11600, Medical Imaging 2021: Biomedical Applications in Molecular, Structural, and Functional Imaging, 116001H (15 February 2021); https://doi.org/10.1117/12.2582312

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available