Guided block matching and 4-D transform domain filter projection denoising method for dynamic PET image reconstruction

EJNMMI Physics

Table 1 SSIM and PSNR between the ground truth and reconstructed SLP image after applying different denoising approaches for different frames

	Frame	1	2	3	4	5	6	7	8
SSIM	Total variation	0.64	0.64	0.64	0.64	0.64	0.64	0.65	0.65
	Wavelet	0.96	0.96	0.96	0.96	0.96	0.95	0.95	0.95
	NLM	0.97	0.97	0.97	0.97	0.97	0.97	0.97	0.97
	BM3D	0.96	0.96	0.96	0.96	0.96	0.96	0.96	0.96
	GBM4D	0.98	0.98	0.98	0.98	0.98	0.98	0.98	0.98
PSNR (dB)	Total variation	17.65	17.66	17.68	17.69	17.70	17.72	17.74	17.76
	Wavelet	25.56	25.46	25.40	25.29	25.24	25.15	25.05	24.97
	NLM	27.28	27.24	27.24	27.20	27.17	27.17	27.10	27.10
	BM3D	26.24	26.22	26.20	26.16	26.14	26.13	26.08	26.04
	GBM4D	28.68	28.75	28.80	28.84	28.87	28.90	28.90	28.89