Abstract #2485
Enforcing divergence free to velocity data from 4D flow MR images
Alejandro Matias Pino Verdugo 1,2 , Joaquin Mura 3 , and Sergio Uribe 2,4
1
Physics Department, Pontificia Universidad
Catlica de Chile, Santiago, Santiago, Chile,
2
Biomedical
Imaging Center, Pontificia Universidad Catlica de
Chile, Santiago, Santiago, Chile,
3
Civil
Engineering School, Pontificia Universidad Catlica de
Valparaiso, Valparaiso, Chile,
4
Radiology
Department School of Medicine, Pontificia Universidad
Catlica de Chile, Santiago, Chile
4D flow imaging has shown great potential to study
different cardiovascular diseases. However, the velocity
data provided by 4D flow is highly prone to be affected
by respiratory motion due to the long acquisition time,
inhomogeneities due to large FOV, and partial volume
effects due to low spatial resolutions, among others.
Some of these terms can be corrected by applying a
linear phase correction estimated from static tissues;
however, a great amount of inaccuracies may still
remain. Another way to correct the data is to assume
that blood flow is incompressible and to enforce the
velocity field to be divergence free. Lately, some
methods have been proposed to enforce divergence free to
the velocity field. In this work, we propose a novel
method to enforce divergence free to the velocity data
by calculating a velocity corrector for each pixel in
the domain of interest.
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