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Abstract #0927

Autonomous 5D-flow with Radial k-Space Sampling

Ana E Rodríguez-Soto1, Eleanor L Schuchardt2, Sanjeet Hedge2, Walter R Witschey3, and Francisco Contijoch1,4
1Radiology, University of California San Diego, La Jolla, CA, United States, 2Rady Children's Hospital San Diego, San Diego, CA, United States, 3University of Pennsylvania, Philadelphia, PA, United States, 4Bioengineering, University of California San Diego, La Jolla, CA, United States

Synopsis

Keywords: Flow, SimulationsAutonomous acquisition of radial k-space data improves sample uniformity in 2D cardiac MRI. We aim to extend this approach to 5D-flow imaging (4D flow with respiratory gating). We have simulated data acquisition using an autonomous approach (ARKS) and compared it to golden-angle (GA) based spiral phyllotaxis acquisition. Simulations were based on physiologic data recorded from pediatric patients undergoing conventional 4D flow imaging. We found that a 4.5 min ARKS scan achieves a higher degree of sampling uniformity than an 8 min GA scan. Future work will focus on implementing 5D-flow ARKS in vivo and evaluating the impact on flow accuracy.

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