Figure 2.

k−t SLR with parallel MRI for accelerated imaging: The perfusion images are acquired using multiple coils and radial sampling with golden angle ray spacing (a). k − t SLR exploits the low rank and smooth spatio-temporal properties of perfusion data by utilizing the non-convex Schatten p-norm (p<1) and the spatio-temporal total variation norm (b). The reconstruction in (b) is formulated as a spectral and sparsity penalized optimization problem; the coil sensitivity encoding in combination with radial sampling improves data consistency in the formulation.