Table 2.
Lesion and SBRT treatment characteristics
| Variable | Number |
|---|---|
| T1N0M0 | 517 (70 %) |
| T2N0M0 | 224 (30 %) |
| Histology: | |
| Adenocarcinoma | 248 (33 %) |
| Non-small cell carcinoma | 238 (32 %) |
| Squamous cell carcinoma | 224 (30 %) |
| Large cell carcinoma | 16 (2 %) |
| Bronchiolo-alveolar carcinoma | 15 (2 %) |
| Median lesion volume, cc (range) | 14.9 (0.5–334) |
| Median lesion size, long axis, cm (range) | 2.4 (0.2–6.5) |
| Lesion location | |
| Right upper lobe | 197 (27 %) |
| Right middle lobe | 38 (5 %) |
| Right lower lobe | 116 (16 %) |
| Right lobe, NOS | 5 (2 %) |
| Left upper lobe | 185 (25 %) |
| Left middle lobe | 13 (2 %) |
| Left lower lobe | 94 (13 %) |
| Left lobe, NOS | 9 (1 %) |
| Bronchus | 3 (0.4 %) |
| Not indicated | 81 (11 %) |
| Median SBRT dose (range), Gy | 54 (10–80) |
| Median number of fractions | 3 (1–5) |
| Median BED10 dose, Gy | 151.2 (2–240) |
| Most common dose/fraction schemes: | |
| 20 Gy × 3 = 60 Gy | 219 (30 %) |
| 18 Gy × 3 = 54 Gy | 162 (22 %) |
| 10 Gy × 5 = 50 Gy | 79 (11 %) |
| 12.5 Gy × 4 = 50 Gy | 78 (11 %) |
| 12 Gy × 4 = 48 Gy | 45 (6 %) |
| 12 Gy × 5 = 60 Gy | 25 (3 %) |
| Median Dmax (range), Gy | 72.7 (10–113) |
| Median monitor units | 39,373 (5614–102,565) |