Table 1.

Vision reconstruction parameters and the corresponding SNR.

Frame duration	Parameters	SNR
Analog like	3.3 × 3.3 × 1.65 mm voxels, 5 iterations, 5 subsets, 4 mm Gaussian filter	10.8
60 s	1.65 × 1.65 × 1.65 mm voxels, 3 iterations, 5 subsets, 3 mm Gaussian filter	9.7
90 s	1.65 × 1.65 × 1.65 mm voxels, 3 iterations, 5 subsets, 2 mm Gaussian filter	9.6
120 s	1.65 × 1.65 × 1.65 mm voxels, 4 iterations, 5 subsets, 2 mm Gaussian filter	9