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External beam radiation parameters used in the study. The parameters are taken from tabulated machine characterization data used in the clinical setting.
| Radiation | Field size (cm2) | Dose rate (cGy/min) | Depth of dose max (cm) |
|---|---|---|---|
| γ (6 MV) | 11 × 11 | 404 | 1.6 |
| γ (18 MV) | 11 × 11 | 404 | 3.6 |
| β-(6 MeV) | 6 × 6 | 388 | 1.4 |
| β-(9 MeV) | 6 × 6 | 392 | 2.2 |
| β-(12 MeV) | 6 × 6 | 392 | 2.7 |
| β-(15 MeV) | 6 × 6 | 392 | 3.0 |
| β-(18 MeV) | 6 × 6 | 400 | 2.5 |
