TABLE 2.
GKRS Treatment Parameters
| GKRS treatment parameters | Value ± SD | Range (IQR) |
|---|---|---|
| Prescribed dose (Gy) | 12 | N/A |
| Prescription isodose (%), median | 50 | 40-90 (50-50) |
| Mean target dose (Gy) | 17.4 ± 4.3 | 12.9-70.2 (16.1-18.2) |
| Maximum target dose (Gy) | 23.5 ± 6.4 | 13.3-100.6 (24.0-24.4) |
| Minimum target dose (Gy) | 9.4 ± 3.0 | 2.7-39.8 (8.3-10.5) |
| Prescription isodose volume/PIV (cm3), median | 0.68 | 0.01-9.20 (0.31-1.95) |
| Treated target volume/TTV (cm3), median | 0.39 | 0.01-5.90 (0.15-1.19) |
| Dose rate (Gy/min), median | 2.675 | 1.35-3.73 (2.05-3.13) |
| Energy index, median | 1.42 | 0-2 (1.32-1.52) |
| Homogeneity index, median | 0.48 | 0.15-2.24 (0.48-0.49) |
| Conformity index, median | 1.88 | 0.94-4.48 (1.43-2.26) |
| Selectivity index, median | 0.54 | 0.22-3.43 (0.44-0.69) |