Table 1.
A list of CAX sampling schemes studied. Note that the sampling scheme with 48 CAX (eight gantry anglesa and six collimator anglesa) was used to generate the reference isocenter.
| Gantry Angle Sampling | Collimator Angle Sampling | ||
|---|---|---|---|
| N | (degrees) | N | (degrees) |
| 1 | 270 | ||
| 2 | 0, 270 | 1 | 0 |
| 2 | 90, 0 | 1 | 90 |
| 3 | 90, 0, 270 | 2 | 270, 90 |
| 4 | 180, 90, 0, 270 | 2 | 225, 45 |
| 4 | 135, 45, 315, 225 | 2 | 315, 135 |
| 8a | 180, 135, 90, 45, 0, 315, 270, 225 | 4 | 225, 315, 45, 135 |
| 9 | 180, 135, 90, 45, 0, 315, 270, 225, 180.1 | 6a | 225, 270, 315, 45, 90, 135 |
| 7 | 225, 270, 315, 0, 45, 90, 135 | ||