Research Article
Accelerating Dynamic Cardiac MR Imaging Using Structured Sparse Representation
Algorithm 1
NCSR-based dynamic cardiac cine MR imaging.
(1) Initialization: | Set the initial estimate and the regularization parameter ; | (2) Outer loop (dictionary learning and clustering): iterate on | (a) Update the dictionaries via -means and PCA; | (b) Inner loop (clustering): iterate on | (b.1) , | (b.2) Compute and | + for ; | (b.3) Compute , where is the dictionary assigned to patch; | (b.4) Compute the using the shrinkage operator given in (8); | (b.5) Update the estimate ; | (b.6) Image matrix estimate update: . |
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