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(a) The BFI (i.e., αDB) values of 50 samples reconstructed by L2 norm, L1 norm and SVR approaches respectively in the phantom experiments. (b) the CV values for 1.5,2.0,2.5 and 3.0cm S-D separations, when L2 norm, L1 norm and SVR were used, respectively. For any of the three approaches, the NL algorithm was performed at fifth-order.
