Table 2.
Dosimetric characteristics.
| Characteristic | No. (%) or Median (IQR) |
|---|---|
| SBRT treatment | |
| Total dose (Gy) | 36 (30–36) |
| Fractions (n) | 3 (1–8) |
| Dose per fraction (Gy) | 10 (6–12) |
| BED (Gy) | 75.9 (58.5–79.2) |
| EQD2 (Gy) | 63.2 (48.7–66) |
| EQD2 < 60 Gy | 12 (41%) |
| EQD2 > 60 Gy | 17 (59%) |
| Isodose line (%) | 98 (91–98) |
| GTV (cc) | 5.7 (1.8–9.6) |
| PTV (cc) | 14.3 (7.8–41.7) |
| Dm GTV (mm) | 1.9 (1.5–2.6) |
| Planning technique | |
| VMAT | 19 (66%) |
| IMRT | 10 (34%) |
BED: biologically effective dose; Dm: diameter; EQD2: equivalent 2 Gy dose; GTV: gross tumor volume; IMRT: intensity-modulated radiotherapy; PTV: planning tumor volume; SBRT: stereotactic body radiotherapy; VMAT: volumetric-modulated arc therapy.