Table 2.
Treatment Characteristics
| Characteristic | All | Inoperable | Operable |
|---|---|---|---|
| No. of patients | 55 | 21 | 34 |
| No. of portals, 2/3/4 | 3/41/11 | 0/18/3 | 3/23/8 |
| Position matching method | |||
| Fiducial marker | 39 (71%) | 14 (67%) | 25 (74%) |
| Vertebral bone | 16 (29%) | 7 (33%) | 9 (26%) |
| IGTV definition | |||
| IGTV-all | 48 (87%) | 18 (86%) | 30 (88%) |
| IGTV-gate | 7 (13%) | 3 (14%) | 4 (13%) |
| GTV (cc), median (range) | 11 (1.1–53) | 12 (1.7–38) | 10 (1.1–53) |
| IGTV (cc), median (range) | 17 (1.8–80) | 22 (2.8–53) | 15 (1.8–80) |
| DVH parameters | |||
| IGTV V95% (%), median (range) | 100 (97–100) | 100 (99–100) | 100 (97–100) |
| IGTV D95% (%), median (range) | 100 (97–100) | 99 (98–100) | 100 (97–100) |
| Lung-GTV V5 (%), median (range) | 14 (4.3–28) | 14 (4.3–28) | 13 (5.2–25) |
| Lung-GTV V20 (%), median (range) | 9.3 (3.0–21) | 9.6 (3.0–21) | 8.7 (3.7–18) |
Abbreviations, IGTV internal gross tumor volume, GTV gross tumor volume, DVH dose-volume histogram. V95% = volume receiving > 95% of the prescribed dose, D95% = minimum doses covering 95% of the volume, V5, 20 = volume receiving dose > 5/20 Gy(RBE)