Table 3 Contrast recovery and background variability values in % for each active sphere for different reconstruction parameters of the 3D OP-OSEM reconstruction algorithm when using CT-based AC
aContrast recovery [%] │ aBackground variability [%] | ||||||||
|---|---|---|---|---|---|---|---|---|
Sphere 10 mm | Sphere 13 mm | Sphere 17 mm | Sphere 22 mm | |||||
Iteration | 172 x 172 | 344 x 344 | 172 x 172 | 344 x 344 | 172 x 172 | 344 x 344 | 172 x 172 | 344 x 344 |
1 | 13.8 │ 2.5 | 15.8 │ 2.8 | 28.1 │ 2.3 | 29.6 │ 2.5 | 48.5 │ 2.1 | 51.3 │ 2.3 | 53.7 │ 2.1 | 56.0 │ 2.2 |
2 | 24.3 │ 3.2 | 28.1 │ 3.5 | 43.8 │ 2.6 | 45.3 │ 2.8 | 66.8 │ 2.3 | 69.7 │ 2.3 | 70.0 │ 1.9 | 72.0 │ 2.2 |
3 | 30.5 │ 3.8 | 35.0 │ 4.3 | 50.5 │ 3.0 | 51.1 │ 3.2 | 72.9 │ 2.5 | 75.2 │ 2.6 | 74.5 │ 2.3 | 76.3 │ 2.4 |
4 | 34.3 │ 4.4 | 38.7 │ 4.9 | 53.4 │ 3.3 | 53.3 │ 3.5 | 75.4 │ 2.7 | 77.5 │ 2.8 | 76.5 │ 2.5 | 78.2 │ 2.6 |
5 | 36.8 │ 4.8 | 40.8 │ 5.3 | 54.8 │ 3.5 | 54.3 │ 3.8 | 76.9 │ 2.9 | 78.7 │ 3.0 | 77.6 │ 2.6 | 79.2 │ 2.7 |