Table 3.
The V14 and adverse effects of three-fraction CyberKnife radiotherapy
| Brainstem | Cerebellum | Cerebrum | |
|---|---|---|---|
| Median tumor volume (cm3) (range) | 1.0 (0.04–2.7) | 7.3 (0.5–22.2) | 8.1 (2.4–25.9) |
| Median prescribed isodose (%) (range) | 63 (49–83) | 60 (50–77) | 59.5 (50–74) |
| Median marginal dose (Gy) (range) | 27 (25–30) | 27 (22–30) | 27 (21–36) |
| Median maximum dose (Gy) (range) | 45.7 (32.5–61.2) | 46.9 (34.9–55.6) | 47.5 (31.9–64.3) |
| Median V14 (cm3) (range) | 1.0 (0.07–2.7) | 5.6 (0.01–16.2) | 6.1 (1.7–31.5) |
| Symptomatic brain edema | 0/28 | 0/29 | 6/102 |
| V14 (cm3) | – | – | 4.6–7.1 |
| Radiation necrosis | 0/28 | 1/29 | 2/102 |
| V14 (cm3) | – | 16.2 | 7.3–31.5 |