Table 4.
Planning target volume (PTV) parameters obtained from the dose–volume histogram (DVH) analysis
| Tumor parameters for CyberKnife (nominal dose in Gy ± SD; subvolumes in %) | |
|---|---|
| V100 (%) | 96.97 ± 2.05 |
| V90 (%) | 99.49 ± 0.73 |
| D100 (Gy) | 20.75 ± 4.16 |
| D90 (Gy) | 28.75 ± 4.51 |
| Dmax (Gy) | 39.69 ± 7.71 |
| Dmean (Gy) | 32.53 ± 5.41 |
| CN | 0.79 ± 0.07 |
| CGI | 36.88 ± 16.0 |
V100 (%) Volume covered by 100% of the prescribed dose, V90 volume covered by 90% of the prescribed dose (%), D100 Dose to 100% of the target volume (Gy), D90 Dose to 90% of the target volume (Gy), Dmean mean dose, Dmax maximum dose, Dmin minimum dose, CN Conformity Number, CGI Conformity Gradient Index