Hao Gao1, 2, Stanislas Rapacchi3, Da Wang3, John Moriarty3, Conor Meehan3, James Sayre3, Gerhard Laub4, Paul Finn3, Peng Hu3
1Mathematics, UCLA, Los Angeles, CA, United States; 2Mathematics, UCI, Irvine, CA, United States; 3Radiology, UCLA, Los Angeles, CA, United States; 4Siemens
We propose a novel CS method for dynamic MRI applications using Prior Rank, Intensity and Sparsity Model (PRISM) and evaluate this technique for cardiac cine MRI. PRISM differs from the previous CS techniques in the ability to apply the sparsifying transform (TF) after background suppression using rank minimization. PRISM was tested on cardiac cine MRI data sets acquired on 6 healthy subjects. The data was fully sampled and retrospectively undersampled. Results show dynamic 2D MRI could be greatly accelerated using PRISM. PRISM provides good-quality image series even from highly undersampled kspace data when state-of-the art traditional compressed sensing fails.