Abstract #0498
3D quantification of wall shear stress and oscillatory index using finite-element interpolations in 4D flow MR data of the thoracic aorta.
Julio Andres Sotelo 1,2 , Jess Urbina 3,4 , Cristian Tejos 3,5 , Israel Valverde 6,7 , Daniel Hurtado 8,9 , and Sergio Uribe 3,4
1
Biomedical Imaging Center, Pontificia
Universidad Catolica de Chile, Santiago, Santiago,
Chile,
2
Electrical
Engineering, Pontificia Universidad Catolica de Chile,
Santiago, Santiago, Chile,
3
Biomedical
Imaging Center, Pontificia Universidad Catolica de
Chile, Santiago, Chile,
4
Radiology,
School of Medicine, Pontificia Universidad Catolica de
Chile, Santiago, Chile,
5
Electrical
Engineering, Pontificia Universidad Catolica de Chile,
Santiago, Chile,
6
Pediatric
Cardiology Unit, Hospital Virgen del Rocio, Sevilla,
Spain,
7
Division
of Cardiovascular Physiology, Institute of Biomedicine
Seville (IBIS), Hospital Universitario Virgen de Rocio/CSIC/University
of Seville, Sevilla, Spain,
8
Biomedical
Engineering Group, Pontificia Universidad Catolica de
Chile, Santiago, Chile,
9
Structural
Engineering, Pontificia Universidad Catolica de Chile,
Santiago, Chile
We propose a novel methodology to compute the WSS in 3D
of whole thoracic aorta from 3D CINE PC-MRI. The
velocity data is interpolated using tetrahedral
finite-elements and the WSS is obtained from a global
least-squares stress-projection method. We report and
compared the WSS with 2D approximation in the aorta of
15 volunteers and one phantom. Our results showed the
local WSS values were in good agreement with the 2D
approximation. To the best of our knowledge this is the
first work that presents the calculation of a 3D WSS map
from 3D PC-MRI data.
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