Sparse Parallel MRI Based on Accelerated Operator Splitting Schemes

Table 3

Numerical results for the TGV-based SparseSENSE model.

	Undersampling factor	Performance metric	AM	FBOSP
Data 1	10	PSNR (dB)	47.37	49.62
		Relative error ()	2.87	2.21
		CPU time (sec.)	142.2	60.0
Data 2	6	PSNR (dB)	54.23	55.95
		Relative error ()	1.48	1.22
		CPU time (sec.)	78.4	28.1
Data 3	4	PSNR (dB)	52.01	53.34
		Relative error ()	1.56	1.34
		CPU time (sec.)	19.8	12.0