Table 7.
Electronic portal image device gamma index comparison total and segmented arcs in Novalis Tx and TrueBeam STx “beam-matched”
| Criteria (%/mm) | Arcs | Novalis Tx 5445 (%) | Novalis Tx 5479 (%) | Novalis Tx 6140 (%) | TrueBeam STx 3169 (%) |
|---|---|---|---|---|---|
| Prostate | |||||
| 3/2 | 1 | 97.1 (3.0) | 97.8 (1.3) | 99.4 (0.6) | |
| 3 | 97.8 (1.4) | 98.7 (0.7) | 99.7 (0.4) | ||
| P | 0.574 | 0.066 | 0.334 | ||
| 3/1 | 1 | 92.9 (7.1) | 96.3 (1.6) | 99.2 (0.7) | |
| 3 | 94.8 (2.1) | 94.8 (1.8) | 98.7 (1.1) | ||
| P | 0.423 | 0.063 | 0.267 | ||
| 2/2 | 1 | 95.3 (3.6) | 95.9 (1.2) | 98.4 (1.7) | |
| 3 | 95.8 (2.0) | 97.3 (1.0) | 98.9 (1.0) | ||
| P | 0.705 | 0.061 | 0.458 | ||
| Breast (mm) | |||||
| 3/2 | 1 | 98.4 (0.6) | 98.8 (0.4) | 98.6 (0.6) | 99.4 (0.4) |
| 2 | 98.9 (0.4) | 99.0 (0.3) | 98.8 (0.4) | 99.6 (0.3) | |
| P | 0.061 | 0.101 | 0.542 | 0.285 | |
| 3/1 | 1 | 94.3 (1.9) | 95.6 (1.0) | 94.9 (1.6) | 97.7 (0.9) |
| 2 | 96.4 (1.1) | 97.1 (0.6) | 96.5 (0.7) | 98.3 (0.8) | |
| P | 0.006 | 0.0007 | 0.015 | 0.159 | |
| 2/2 | 1 | 96.5 (0.9) | 97.0 (0.6) | 96.3 (1.3) | 98.0 (0.8) |
| 2 | 97.0 (0.8) | 97.3 (0.7) | 96.6 (0.8) | 98.5 (0.7) | |
| P | 0.167 | 0.391 | 0.635 | 0.124 | |
| H&N (mm) | |||||
| 3/2 | 1 | 96.0 (2.5) | 97.1 (1.8) | 97.0 (1.5) | 98.0 (1.9) |
| 3 | 96.4 (1.6) | 97.3 (1.0) | 97.5 (0.6) | 98.6 (1.2) | |
| P | 0.674 | 0.720 | 0.343 | 0.501 | |
| 3/1 | 1 | 89.6 (5.4) | 93.4 (3.3) | 93.2 (2.6) | 95.2 (3.6) |
| 3 | 90.3 (3.9) | 93.8 (1.9) | 94.3 (1.0) | 96.7 (2.2) | |
| P | 0.747 | 0.795 | 0.247 | 0.409 | |
| 2/2 | 1 | 92.5 (3.9) | 94.6 (2.3) | 93.8 (2.0) | 95.5 (3.5) |
| 3 | 93.4 (2.1) | 94.8 (1.4) | 94.4 (1.3) | 97.0 (1.6) | |
| P | 0.534 | 0.775 | 0.450 | 0.352 |
H and N: Head-and-neck