Abstract #2694

Clinically-Feasible Non-Contrast Abdominopelvic MRA using 3D Radial Stack-of-Stars k-space Sampling and Compressed Sensing

Marc D Lindley^1,2, Daniel Kim², Kristi Carlston², Leif Jensen², Daniel Sommers², Ganesh Adluru², Edward VR DiBella², Christopher J Hanrahan², and Vivian S Lee²

¹Physics, University of Utah, Salt Lake City, UT, United States, ²Radiology, UCAIR, University of Utah, Salt Lake City, UT, United States

Quadruple inversion-recovery (QIR), non-contrast (NC) MRA was developed as an alternative to contrast-enhanced MRA, and it performance was evaluated in patients with peripheral arterial disease. The scan time for QIR with respiratory gating, however, is on the order of 10-15 minutes. We sought to accelerate QIR using a combination of 3D radial stack-of-stars sampling with tiny golden angles and compressed sensing (CS). This study shows that 5.3-fold accelerated QIR with radial k-space sampling and CS produces images that are comparable to those produced by original QIR (e.g., 2.7-fold acceleration using GRAPPA). In 10 human subjects, normalized signal difference and vessel dimensions were not significantly different between original QIR and 5.3-fold accelerated QIR with radial k-space sampling and CS.

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