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Contrast ratios for the nine-sphere phantom with background. The true value of contrast in the phantom was equal to 7:1.
| Contrast ratio in the reconstructed images | |||
|---|---|---|---|
| Distance between the scatter and absorption detectors (mm) | Exact | No RR | RR |
| 30 | 6.73 | 3.63 | 5.68 |
| 50 | 6.74 | 4.00 | 5.44 |
| 70 | 6.68 | 4.17 | 5.36 |
