Abstract #3373

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

Coskun Bilgi¹, Abbas N Moghaddam^1,2, Haojie Geng¹, Prakash Kumar³, Gregory A Magee⁴, Krishna S Nayak³, and Niema M Pahlevan^1,5

¹Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA, United States, ²Biomedical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran (Islamic Republic of), ³Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, United States, ⁴Division of Vascular Surgery and Endovascular Therapy, Department of Surgery, University of Southern California, Los Angeles, CA, United States, ⁵Division of Cardiovascular Medicine, University of Southern California, Los Angeles, CA, United States

Synopsis

Keywords: Flow, Velocity & Flow, Low-field

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.

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