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Abstract #0742

Motion-guided low-rank plus sparse (L+S) reconstruction for free-breathing dynamic MRI

Ricardo Otazo 1 , Thomas Koesters 1 , Emmanuel Cands 2 , and Daniel K Sodickson 1

1 Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University School of Medicine, New York, NY, United States, 2 Departments of Mathematics and Statistics, Stanford University, Stanford, CA, United States

A non-rigid motion model is incorporated into the low-rank plus sparse (L+S) reconstruction approach for free-breathing accelerated dynamic MRI with separation of background and dynamic components. The motion operator registers the time-series of images, which improves low-rank and sparsity conditions along the temporal domain and enhances temporal fidelity in the reconstructed images. The motion-guided L+S reconstruction approach is tested in prospectively undersampled dynamic cardiac and abdominal data sets acquired during free-breathing.

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