Multicomponent MR Image Denoising

Table 2

Comparison of the MNLM method and the proposed method for different number of images. RMSE in the T1 image is presented for the filtering with each number of components and noise level.

Noise Std. Dev. (%)	RMSE
	MNLM				OMNLM-PCA
	1	2	3	4	1	2	3	4
1%	2.03	2.02	2.00	2.00	1.65	1.22	1.13	1.10
3%	3.58	3.24	3.24	3.34	3.69	2.61	2.42	2.37
5%	5.55	5.02	5.09	5.47	5.58	3.81	3.53	3.45
7%	7.64	7.06	7.24	7.88	7.32	5.12	4.66	4.58
9%	9.30	8.54	8.88	9.60	9.34	6.35	5.79	5.66
Average	5.62	5.18	5.29	5.66	5.51	3.82	3.51	3.43