Table 3.
Novalis Tx and TrueBeam STx dosimetric leaf gap and transmission for open field and multileaf collimator
| Energy (MV) | Data | Novalis Tx 5445 | Novalis Tx 5479 | Novalis Tx 6140 | TrueBeam STx 3169 |
|---|---|---|---|---|---|
| 6 | DLG (mm) | 0.854 | 0.901 | 0.872 | 0.866 |
| Transmission for open field (%) | 1.25 | 1.27 | 1.20 | 1.17 | |
| Transmission for MLC (%) | 1.27 | 1.18 | 1.20 | 1.17 | |
| SRS-6 | DLG (mm) | 0.815 | 0.901 | 0.864 | |
| Transmission for open field (%) | 1.12 | 1.17 | 1.14 | ||
| Transmission for MLC (%) | 1.16 | 1.18 | 1.14 | ||
| 10 | DLG (mm) | 0.932 | 0.957 | 0.908 | |
| Transmission for open field (%) | 1.37 | 1.37 | 1.40 | ||
| Transmission for MLC (%) | 1.46 | 1.37 | 1.40 |
Novalis Tx 5479 measurements were taken as reference. DLG: Dosimetric leaf gap, MLC: Multileaf collimator