Approximate Sparsity and Nonlocal Total Variation Based Compressive MR Image Reconstruction

Table 1

SNR (dB) results of different methods with different sampling ratios.

Image	Samp. ratio	TVCMRI	RecPF	FCSA	WasNLTV
Chest (220 × 220)	10	8.12	8.15	8.31	8.74
	20	13.12	13.28	13.75	14.70
	30	17.71	18.15	19.19	20.39
	40	20.95	21.35	22.59	23.64
	50	24.19	24.49	26.12	26.97
Artery (220 × 220)	10	8.17	8.39	12.40	13.35
	20	14.78	15.51	20.35	21.20
	30	18.57	19.86	24.61	25.43
	40	22.02	23.66	28.35	29.33
	50	24.74	26.62	32.08	33.60
Cardiac (192 × 192)	10	3.77	1.06	4.34	5.19
	20	13.45	13.80	15.24	16.01
	30	16.93	17.38	18.25	18.97
	40	17.07	17.67	18.62	21.71
	50	21.26	21.62	22.52	23.24
Brain (210 × 210)	10	4.09	4.14	4.84	5.23
	20	10.40	10.64	16.18	17.58
	30	14.37	14.85	21.33	22.13
	40	17.65	18.34	25.17	25.93
	50	21.57	22.45	28.85	29.75