Abstract #2492
Quantification of Wall Shear Stress using Finite-Element Interpolations in Multidimensional Phase Contrast MR data of the Thoracic Aorta
Julio Sotelo 1,2 , Jess Urbina 3,4 , Ernesto Ortiz 5 , Cristian Tejos 3,6 , Israel Valverde 7,8 , Daniel E. Hurtado 5,9 , 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
Structural
Engineering, Pontificia Universidad Catolica de Chile,
Santiago, Chile,
6
Electrical
Engineering, Pontificia Universidad Catolica de Chile,
Santiago, Chile,
7
Pediatric
Cardiology Unit, Hospital Virgen del Rocio, Sevilla,
Spain,
8
Division
of Cardiovascular Physiology, Institute of Biomedicine
Seville (IBIS), Hospital Universitario Virgen de
Rocio/CSIC/University of Seville, Sevilla, Spain,
9
Biomedical
Engineering Group, Pontificia Universidad Catolica de
Chile, Santiago, Chile
We present a novel method for calculating the WSS
distribution in the aorta based on finite-element
interpolations. The velocity field obtained from PC-MRI
data was interpolated using linear triangular
finite-elements and the axial WSS vector was obtained
from a global least-squares stress-projection method. We
used a Poiseuille flow profile and data acquired in
volunteers for evaluating the robustness of the method.
Our results showed that the local WSS values were in
good agreement with the theoretical Poiseuille values
and observed significant difference in the volunteers
study in comparison to previews reported methods.
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