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Gamma knife radiosurgery parameters
| Characteristics | Median (mean, range) |
|---|---|
| Number of isodose centers | 5 (7.8, 3–19) |
| Margin dose (Gy) | 12 (11.8, 10–15) |
| Maximum dose (Gy) | 30 (28.6, 20–40) |
| Isodose (%) | 40 (40, 30–75 |
| Prescription dose (mL) | 6.2 (7.1, 1.9–12.4) |
| Conformity index1 | 1.3 (1.1, 0.7–1.7) |
Prescription dose/tumor volume
