Table 1.
Diameter, range and modulation widths for each treatment field considered. Proton beam energies refer to the treatment head entrance. The normalization point for the target dose ensured that there is comparable dose in the center of the target for proton therapy and IMRT simulations.
| Field | Aperture diameter [cm] | Protons | IMRT | |||
|---|---|---|---|---|---|---|
| Beam Energy [MeV] | SOBP range [cm] | SOBP Modulation width [cm] | Beam Energy [MV] | Normalization depth [cm] | ||
| 1 | 3 | 169.2 | 10 | 5 | 6 | 7.5 |
| 2 | 6 | 169.2 | 10 | 5 | 6 | 7.5 |
| 3 | 9 | 169.2 | 10 | 5 | 6 | 7.5 |
| 4 | 3 | 178.3 | 15 | 10 | 6 | 10 |
| 5 | 6 | 178.3 | 15 | 10 | 6 | 10 |
| 6 | 9 | 178.3 | 15 | 10 | 6 | 10 |