Multi-level (uniform + non-uniform) sampling for accelerated dynamic MRI either solves a computationally expensive full regression problem, or breaks the problem into two separate steps for each sampling operator. Here, the latter approach is taken, with low-rank matrix completion used as a pre-processing step to complete the non-uniform sampling operator before SENSE reconstruction unfolds the effects of the uniform sampling operator. It is shown that both spatial and temporal resolution are retained with LRMC + SENSE in comparison with more traditional pre-processing steps.
