Table 2.
Summary of Main Characteristics of the Treatment Plans Concerning Dose Prescription and Arc Definition Settings.a
| Breast | Head and Neck | Prostate | |
|---|---|---|---|
| Dose prescription | 2.67 Gy/fr; 15 fr | SIB: 2.12Gy/fr; 33 fr | SIB: 2.65 Gy/fr; 28 fr |
| PTV: 40.05 Gy | PTV1: 54.4 Gy | PTV1: 51.8 Gy | |
| PTV2: 69.96 Gy | PTV2: 65.5 Gy | ||
| PTV3: 74.2 Gy | |||
| 2 arcs plans | |||
| Number or arcs | 2 partial arcs | 2 full arcs | 2 full arcs |
| Coll. angle arc 1 | (10/20)° | (10/20)° | 20° |
| Coll. angle arc 2 | (350/340)° | (350/340)° | 340° |
| Gantry start angle | ∼295° range: (285/307) | Full rotation | Full rotation |
| Gantry stop angle | ∼173° range: (160/180) | – | – |
| Avoidance sector per arc | Start: (345/20)° | – | – |
| Stop (90/110)° | – | – | |
| 3 arcs plans (Halcyon only) | |||
| Number or arcs | 3 partial arcs | 3 full arcs | 3 full arcs |
| Coll. angle arc 1 | (10/20)° | (10/20)° | 20° |
| Coll. angle arc 2 | (350/340)° | (350/340)° | 340° |
| Coll. angle arc 3 | 90° | 90° | 90° |
| Gantry start angle | ∼295°range: (285/307) | Full rotation | Full rotation |
| Gantry stop angle | ∼173°range: (160/180) | – | – |
| Avoidance sector per arc | Start: (345/20)° | – | – |
| Stop (90/110)° | – | – | |
Abbreviations: Coll., collimator; Fr, fractions; PTV, planning target volume; SIB, simultaneous integrated boost.
a The ranges expressed for the collimator rotation or in the start/stop angles for the breast and the head and neck plans represent the limits for the adjustment for individual patients.