Iman Khodarahmi1, Mostafa Shakeri, 12,
Ron Pratt3, Janaka Wansapura3, Michael Keith Sharp2,
Amir Arsham Amini1
1Department of Electrical and Computer Engineering,
University of Louisville, Louisville, KY, United States; 2Department
of Mechanical Engineering, University of Louisville, Louisville, KY, United
States; 3Imaging Research Center, Cincinnati Childrens Hospital
Medical Center, Cincinnati, OH, United States
Phase
Contrast MRI (PC-MRI) can be used to measure velocities in fluid flow using
the phase mapping of the moving spins. Phase velocity mapping technique
assumes that the velocity is constant over the echo time. This assumption is
not valid for accelerating spins. In this study, we sought to evaluate the
accuracy of PC-MRI velocity field in a severe stenotic phantom model, where
the convective component of the acceleration is large. Considering the
Particle Image Velocimetry (PIV) technique as the gold standard, we observed
errors up to 26%, 16%, and 42% for pre-stenosis, at the stenosis, and
post-stenosis regions, respectively.