Table 6.
Electronic portal image device gamma index comparison total arcs in Novalis Tx and TrueBeam STx “beam-matched”
| Criteria (%/mm) | Novalis Tx 5445 (%) | Novalis Tx 5479 (%) | Novalis Tx 6140 (%) | TrueBeam STx 3169 (%) |
|---|---|---|---|---|
| Prostate | ||||
| 3/2 | 97.1 (3.0) | 97.8 (1.3) | 99.4 (0.6) | |
| P | 0.143 | 0.027 | ||
| 3/1 | 92.9 (7.1) | 96.3 (1.6) | 99.2 (0.7) | |
| P | 0.123 | 0.012 | ||
| 2/2 | 95.3 (3.6) | 95.9 (1.2) | 98.4 (1.7) | |
| P | 0.164 | 0.019 | ||
| Breast | ||||
| 3/2 | 98.4 (0.6) | 98.8 (0.4) | 98.6 (0.6) | 99.4 (0.4) |
| P | 0.119 | 0.571 | 0.001 | |
| 3/1 | 94.3 (1.9) | 95.6 (1.0) | 94.9 (1.6) | 97.7 (0.9) |
| P | 0.119 | 0.150 | 0.008 | |
| 2/2 | 96.5 (0.9) | 97.0 (0.6) | 96.3 (1.3) | 98.0 (0.8) |
| P | 0.065 | 0.269 | 0.0001 | |
| H&N | ||||
| 3/2 | 96.0 (2.5) | 97.1 (1.8) | 97.0 (1.5) | 98.0 (1.9) |
| P | 0.279 | 0.911 | 0.306 | |
| 3/1 | 89.6 (5.4) | 93.4 (3.3) | 93.2 (2.6) | 95.2 (3.6) |
| P | 0.169 | 0.421 | 0.508 | |
| 2/2 | 92.5 (3.9) | 94.6 (2.3) | 93.8 (2.0) | 95.5 (3.5) |
| P | 0.073 | 0.888 | 0.283 |
H and N: Head-and-neck