Percentage COV of Observed VOIs as Function of Actual Sphere Volume and VOI Method
| Sphere volume | Percentage COV | |||||||
| SBR = 9 | SBR = 4.5 | |||||||
| A41 | 50 | A50 | A70 | A41 | 50 | A50 | A70 | |
| 26.52 | 2.5 | 2.8 | 3.5 | 14.3 | 6.8 | 8.0 | 8.4 | 40.6 |
| 11.49 | 5.1 | 7.3 | 5.2 | 6.7 | 6.5 | 6.9 | 4.7 | 40.8 |
| 5.57 | 7.3 | 4.2 | 6.6 | 16.3 | 6.1 | 6.5 | 8.2 | 30.2 |
| 2.57 | 9.5 | 8.1 | 5.9 | 23.0 | 19.2 | 20.7 | 13.0 | 54.7 |
| 1.15 | 17.0 | 11.6 | 14.1 | 24.4 | 16.4 | 41.6 | 18.3 | 53.6 |