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 k_z-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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