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Abstract #3373

High-Resolution Half-Spoke and Full-Spoke 4D Lung MRI with Golden-Angle 3D Radial Acquisition and Motion-Resolved Sparse Reconstruction

Can Wu1, Guruprasad Krishnamoorthy2, Ergys Subashi1, Victoria Yu1, and Ricardo Otazo1,3
1Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, NY, United States, 2Philips Healthcare, MR R&D, Rochester, MN, United States, 3Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, United States


This work aims to develop high-resolution 4D lung MRI with golden-angle 3D radial (kooshball) acquisition and motion-resolved sparse reconstruction. The golden-angle radial k-space lines were continuously acquired during free-breathing and retrospectively binned to multiple respiratory phases with respect to the respiratory signal obtained from a built-in motion-sensing camera. The sparsity along the respiratory motion dimension was exploited using compressed sensing reconstruction to suppress artifacts and improve SNR. The feasibility of half-spoke ultrashort echo time (UTE) and full-spoke 4D lung MRI was demonstrated on healthy volunteers on a clinical 3T MRI scanner.

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