基于深度学习的扩散磁共振成像降噪方法研究进展

马素超, 王远军

Research Progress on Diffusion Magnetic Resonance Imaging Noise Reduction Methods Based on Deep Learning

MA Suchao, WANG Yuanjun

表4 不同噪声水平下各降噪方法的PSNR指标对比

Table 4 Comparison of PSNR metrics for different denoising methods at various noise levels

b值/（s/mm²）	噪声水平	噪声图像	PCA	MPPCA	Patch2Self	1D-CNN
b=0	2%	32.27	35.87	37.79	35.33	36.02
	4%	27.16	33.00	33.37	33.46	35.08
	6%	23.72	29.49	29.67	30.19	31.77
	8%	21.32	26.72	26.61	27.30	30.77
	10%	19.40	24.29	24.06	24.73	27.58
b=1000	2%	20.29	25.21	26.10	25.67	27.77
	4%	14.52	19.22	19.52	19.73	23.54
	6%	10.90	14.58	14.72	15.08	20.46
	8%	8.18	11.14	11.21	11.66	17.16
	10%	5.97	8.48	8.42	8.91	15.96
b=2000	2%	17.48	21.82	22.22	21.85	26.33
	4%	11.28	13.44	16.62	15.45	23.65
	6%	7.32	9.70	12.80	10.63	20.51
	8%	4.44	7.42	7.48	6.37	19.61
	10%	2.19	5.95	3.58	4.21	17.92