TABLE 5. Average PSNR, SSIM, and IFC of Resolution-Enhanced MRIs.

Metric	Volunteer	Scale	SRCNN [10]	FSRCNN [11]	DRCN [12]	ACNS
PSNR (dB)	1		29.62 ± 0.76	29.79 ± 0.78	29.84 ± 0.75	29.58 ± 0.88
			29.21 ± 2.50	29.40 ± 2.48	29.67 ± 2.59	27.88 ± 0.98
			27.22 ± 2.10	27.54 ± 2.12	27.98 ± 1.95	26.38 ± 1.09
	2		30.91 ± 2.27	31.10 ± 2.26	31.31 ± 2.54	33.12 ± 2.11
			28.62 ± 1.78	28.86 ± 1.87	29.18 ± 1.78	30.37 ± 2.07
			26.71 ± 1.58	27.05 ± 1.62	27.59 ± 1.49	28.15 ± 1.48
SSIM	1		0.80 ± 0.02	0.81 ± 0.02	0.81 ± 0.02	0.82 ± 0.02
			0.77 ± 0.07	0.78 ± 0.07	0.78 ± 0.07	0.75 ± 0.02
			0.70 ± 0.07	0.71 ± 0.07	0.72 ± 0.07	0.71 ± 0.03
	2		0.84 ± 0.05	0.84 ± 0.05	0.84 ± 0.05	0.91 ± 0.03
			0.76 ± 0.06	0.76 ± 0.06	0.77 ± 0.06	0.84 ± 0.04
			0.69 ± 0.06	0.70 ± 0.06	0.72 ± 0.06	0.79 ± 0.04
IFC	1		5.19 ± 0.15	5.56 ± 0.15	5.79 ± 0.17	5.58 ± 0.12
			4.21 ± 1.05	4.53 ± 1.09	4.78 ± 1.14	3.48 ± 0.09
			2.67 ± 0.62	2.86 ± 0.70	3.14 ± 0.64	2.32 ± 0.11
	2		5.33 ± 0.30	5.70 ± 0.30	5.99 ± 0.40	5.94 ± 0.35
			3.33 ± 0.13	3.62 ± 0.16	3.84 ± 0.14	3.52 ± 0.22
			2.15 ± 0.11	2.24 ± 0.11	2.58 ± 0.12	2.27 ± 0.11