Table 2. Parameters used for BM4D denoising algorithm.

Parameter	Description	NA = 1 (Strong)	NA = 5 (Medium)	NA = 10 (Weak)
N1	Cube size (N1 × N1 × N1)	8	6	5
N2	Maximum number of similar blocks	64	64	32
Ns	Search neighborhood size (Ns × Ns × Ns)	11	11	11
lambda_thr4D	Threshold value	4.5	3.9	3.2
Thresholding	Hard or soft thresholding	‘Soft’	‘Soft’	‘Soft’
do_wiener	Flag to perform (1) or not (0) the wiener filtering step	0	0	0