Quantitative Flow Visualization in a Patient-Specific Compliant Type B Aortic Dissection Phantom Using 0.55T MRI

Motivation: PC-MRI allows for both in-vivo and in-vitro evaluation of complex flow patterns. The accuracy and consistency of these measurements needs to be re-evaluated at new low- and mid-field strengths such as 0.55T. Goal(s): To evaluate flow and velocity patterns using 0.55T PC-MRI to assess the scanner’s suitability for complex flow quantification. Approach: Using an in-vitro human circulatory setup with a patient-specific type-B aortic dissection phantom to measure complex velocity fields. Results: Excellent agreement between MRI-obtained and measured flowrates were observed. Complex rotational flow patterns were captured. Results are consistent within slices and experimental conditions, demonstrating the efficacy of 0.55T MRI for flow evaluation. Impact: This study establishes the viability of 0.55T MRI for phase contrast imaging for three-dimensional velocity field measurements. The findings validate the consistency of flow quantification, and open new avenues for further opportunities on complex flow visualization.