Abstract #4745

Highly-Accelerated, Real-Time, Phase-Contrast MRI using Radial k-space Sampling and Cartesian GRASP Reconstruction: A Feasibility Study in Pediatric Patients

Hassan Haji-valizadeh^1,2, Joshua D. Robinson^3,4, Michael Markl², Cynthia K. Rigsby^2,5, and Daniel Kim²

¹Department of Biomedical Engineering, Northwestern University, Evanston, IL, United States, ²Department of Radiology, Northwestern University, Chicago, IL, United States, ³Division of Pediatric Cardiology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, United States, ⁴Department of Medical Imaging, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, United States, ⁵Department of Medical Imaging, Northwestern University, Chicago, IL, United States

Iterative compressed sensing reconstruction of real-time phase-contrast MR images acquired with highly-accelerated radial k-space sampling produces considerable image blurring. We propose a Cartesian Golden-angle radial sparse parallel (GRASP) framework that achieves a good balance between image reconstruction speed and data fidelity. The performance of the proposed reconstruction framework is compared with the original GRASP and GROG-GRASP frameworks using 38.4-fold accelerated phase-contrast MRI data acquired from pediatric patients.

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