Table 2.
Treatment-Related Parameters.
| Treatment-Rrelated Parameters | |
|---|---|
| Prior irradiation to target site | 42.3% |
| Median BED of prior RT | 88.1 Gy (range 66.8-161.2) |
| Median EQD2 of prior RT | 54.4 Gy (range 44.5-106.4) |
| Treatment technique of palliative RT | |
| VMAT | 50.0% |
| 3D-RT | 30.8% |
| HT | 15.4% |
| Electrons | 3.8% |
| Applied dose of palliative RT (total dose/dose per fraction) | |
| 39 Gy / 3 Gy | 26.9% |
| 45 Gy / 3 Gy | 23.1% |
| 36 Gy / 3 Gy | 11.5% |
| 30 Gy / 3 Gy | 7.7% |
| 51 Gy / 3 Gy | 7.7% |
| 9 Gy / 3 Gy | 3.8% |
| 20 Gy / 4 Gy | 3.8% |
| 38 Gy / 2 Gy | 3.8% |
| 40.05 Gy / 2.67 Gy | 3.8% |
| 46.8 Gy / 1.8 Gy | 3.8% |
| 54 Gy / 3 Gy | 3.8% |
| Median PTV volume | 1206.8 cm3 (range 242.4-4112.4) |
| Systemic treatment during RT | |
| Chemotherapy | 7.7% |
| Immunotherapy | 3.8% |
Abbreviations: RT, radiotherapy; PTV, planning target volume; VMAT, volumetric modulated arc therapy; 3D-CRT, three-dimensional conformal radiotherapy; HT, helical radiotherapy; BED, biologically effective dose.