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Abstract #4249

Dynamic Cardiac MRI Reconstruction with Weighted Redundant Haar Wavelets

Jun Liu1, Jeremy Rapin1, Ti-chiun Chang1, Alban Lefebvre1, Michael Zenge2, Edgar Mueller2, Mariappan S. Nadar1

1Siemens Corporate Research, Princeton, NJ, United States; 2Siemens AG, Healthcare Sector, Erlangen, Germany

High temporal resolution is often desired in Cardiac Magnetic Resonance Imaging (CMRI). Parallel imaging enables the reconstruction with a reduced the number of acquired frequencies, hence accelerating the acquisition, and spiral sampling scheme is widely used in CMRI. In this work, a new approach was proposed for dynamic cardiac MRI reconstruction by applying an L1 regularization based on the weighted 3D redundant Haar wavele for incorporating the smoothness in both spatial and temporal directions. Experiments conducted on a CMRI data with only 15 spokes for each temporal phase demonstrated the effectiveness of the proposed approach.