Reference-Driven Undersampled MR Image Reconstruction Using Wavelet Sparsity-Constrained Deep Image Prior

Table 3

RelErr, PSNR, and SSIM values of reconstruction by different methods under radial undersampled mask and variable density undersampled mask.

Images	Mask (undersampled rate)	Methods	RelErr (%)	PSNR (dB)	SSIM
Brain A	Radial (10%)	Zero-filling	10.15	28.2588	0.7601
		DIP	6.25	33.6669	0.9408
		RWS-DIP	3.52	37.4635	0.9780
	Variable density (20%)	Zero-filling	7.93	30.3949	0.8483
		DIP	3.35	38.0061	0.9798
		RWS-DIP	2.57	40.2062	0.9859
Brain B	Radial (20%)	Zero-filling	15.35	27.5173	0.7928
		DIP	8.20	32.9691	0.9610
		RWS-DIP	5.76	36.0310	0.9786
	Variable density (30%)	Zero-filling	16.99	26.6374	0.7596
		DIP	6.38	35.1479	0.9708
		RWS-DIP	4.75	37.7008	0.9827
Brain C	Radial (20%)	Zero-filling	12.80	29.4250	0.8256
		DIP	8.04	33.4771	0.9623
		RWS-DIP	6.02	35.9762	0.9775
	Variable density (30%)	Zero-filling	14.34	28.4345	0.8038
		DIP	7.03	34.6578	0.9692
		RWS-DIP	5.18	37.2897	0.9811