A MRI Denoising Method Based on 3D Nonlocal Means and Multidimensional PCA

Table 1

The comparison of denoising methods with different noise levels on T1 weighted MRI Images.

Denoising method	3% Rician noise			4% Rician noise			5% Rician noise
	SNR	PSNR	SSIM	SNR	PSNR	SSIM	SNR	PSNR	SSIM
3D-ADF	13.7207	25.4512	0.7642	12.9584	25.4144	0.7624	12.1337	25.3515	0.7604
OMNLM_LAPCA	18.5248	35.0833	0.9495	16.0899	33.2808	0.9234	14.1684	31.7119	0.8927
NLM3D	25.9919	37.5705	0.976	24.0109	35.9133	0.965	20.8779	34.5518	0.9472
Proposed	27.0346	38.5828	0.9864	25.0351	36.924	0.9755	22.9218	35.5598	0.9555