Table 1.

For the BraTs and M4Raw datasets, comparison of our method with state-of-the-art methods, including Zero Filling, K-DCNN (Han et al., 2019), VarNet (Sriram et al., 2020), MINet (Feng et al., 2021), MTrans (Feng et al., 2022), MCCA (Li et al., 2023), DCAMSR (Huang et al., 2023a), KV-Net (Liu et al., 2022), DudoRNet (Zhou and Zhou, 2020), and DudoCAF (Lyu et al., 2022). mean ± standard deviation are reported for each method, and the best metrics are highlighted in bold font.

Task		4× Acceleration		4× Acceleration (Low-field)
BraTs		T2WI (4×)		T1WI (Low-field)		T2WI (4×, Low-field)
Domain	Method	PSNR ↑	SSIM ↑	PSNR ↑	SSIM ↑	PSNR ↑	SSIM ↑
Single domain	Zero Filling	30.04±1.51	0.748±0.034	22.27±2.08	0.226±0.020	25.39±1.15	0.217±0.017
	K-DCNN	34.72±1.56	0.929±0.013	34.30±2.14	0.925±0.015	32.60±1.43	0.904±0.013
	VarNet	35.43±1.59	0.958±0.019	37.20±1.99	0.967±0.007	32.49±1.47	0.931±0.011
	MINet	38.26±1.74	0.976±0.006	37.32±2.04	0.967±0.007	35.25±1.56	0.960±0.010
	MTrans	37.83±1.63	0.973±0.009	37.10±2.01	0.966±0.007	34.75±1.42	0.959±0.012
	MCCA	37.95±1.68	0.975±0.006	37.21±2.02	0.967±0.007	34.78±1.48	0.958±0.010
	DCAMSR	38.60±1.75	0.978±0.006	37.60±2.03	0.968±0.007	35.36±1.56	0.961±0.009
Dual domain	KV-Net	36.78±1.64	0.967±0.007	38.09±2.00	0.970±0.006	34.23±1.53	0.947±0.010
	DudoRNet	38.91±1.68	0.976±0.005	38.40±2.01	0.972±0.006	35.75±1.56	0.959±0.010
	DudoCAF	38.76±1.65	0.975±0.007	38.15±1.92	0.971±0.006	35.26±1.45	0.956±0.010
	Ours	40.25±1.71	0.983±0.005	39.21±1.93	0.977±0.005	36.55±1.54	0.968±0.008
Task		4× Acceleration (Low-field)				8× Acceleration (Low-field)
M4Raw		T1WI (Low-field)		T2WI (4×, Low-field)		T2WI (8×, Low-field)
Domain	Method	PSNR ↑	SSIM ↑	PSNR ↑	SSIM ↑	PSNR ↑	SSIM ↑
Single domain	Zero Filling	33.44±1.27	0.857±0.027	24.06±1.40	0.636±0.022	18.94±1.69	0.522±0.026
	K-DCNN	34.06±2.51	0.918±0.017	28.70±1.22	0.792±0.027	27.26±1.32	0.759±0.036
	VarNet	36.04±1.40	0.925±0.016	29.61±1.25	0.808±0.025	28.11±1.15	0.773±0.030
	MINet	36.48±1.36	0.928±0.016	30.86±1.33	0.828±0.024	29.37±1.47	0.802±0.033
	MTrans	36.24±1.53	0.928±0.017	30.16±1.23	0.815±0.025	29.38±1.49	0.805±0.032
	MCCA	35.82±1.48	0.926±0.016	30.67±1.31	0.827±0.024	29.41±1.47	0.804±0.031
	DCAMSR	36.41±1.33	0.928±0.016	31.03±1.32	0.833±0.023	29.56±1.38	0.806±0.031
Dual domain	KV-Net	35.69±1.51	0.925±0.016	30.24±1.27	0.820±0.025	29.36±1.43	0.801±0.031
	DudoRNet	36.23±1.33	0.926±0.016	30.36±1.28	0.823±0.025	29.43±1.39	0.802±0.031
	DudoCAF	36.34±1.32	0.928±0.017	30.68±1.30	0.830±0.025	29.40±1.45	0.803±0.032
	Ours	36.88±1.34	0.930±0.016	31.87±1.28	0.839±0.023	30.40±1.44	0.816±0.029