Table 1 Results of the dose measurements for two different field sizes: for both field sizes, there is a decrease in dose relative to ungated treatment when reducing the gating level and therefore increasing the number of start-up processes and delivery time
Gating level | Relative dose (10 x 10 cm 2 field) | Relative dose (20 x 20 cm 2 field) |
|---|---|---|
50% | 99.41 ± 0.07% | 99.59 ± 0.05% |
40% | 99.43 ± 0.04% | 99.53 ± 0.04% |
30% | 99.45 ± 0.52% | 99.46 ± 0.04% |
20% | 98.81 ± 0.05% | 99.09 ± 0.05% |
10% | 97.85 ± 0.04% | 98.28 ± 0.05% |