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.