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Abstract #1091

Motion-Resolved Golden-Angle Radial Sparse MRI Using Variable-Density Stack-of-Stars Sampling

Li Feng1, Tiejun Zhao2, Hersh Chandarana1, Daniel K Sodickson1, and Ricardo Otazo1

1Center for Advanced Imaging Innovation and Research (CAI2R), New York University School of Medicine, New York, NY, United States, 2Siemens Medical Solutions, New York, NY, United States

This work proposes a 3D free-breathing MRI technique called variable-density XD-GRASP, which employs stack-of-stars sampling with variable-density kz-undersampling and motion-resolved sparse reconstruction. The new sampling scheme combines the advantages of conventional stack-of-stars sampling and kooshball-type 3D radial sampling, enabling 3D continuous MRI with flexible slice resolution, robust fat suppression and low sensitivity to eddy currents. The performance of variable-density XD-GRASP is demonstrated for free-breathing liver MRI.

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