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.
