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Delta4 gamma index comparison between Novalis Tx and TrueBeam STx “beam-matched”
| Case | Criteria (%/mm) | Gamma index Novalis Tx 6140 (%) | Gamma index TrueBeam STx 3169 (%) | P |
|---|---|---|---|---|
| Prostate | 3/2 | 98.9 (0.8) | 99.5 (0.7) | 0.086 |
| 3/1 | 94.4 (2.0) | 96.1 (2.5) | 0.104 | |
| 2/2 | 97.0 (1.4) | 98.1 (1.0) | 0.060 | |
| H&N | 3/2 | 98.5 (1.4) | 98.4 (2.1) | 0.889 |
| 3/1 | 93.9 (3.7) | 96.2 (4.1) | 0.270 | |
| 2/2 | 95.0 (3.0) | 95.4 (4.7) | 0.877 |
H and N: Head-and-neck
