Table 1 Dose-volume constraints for the PTVs and OAR
PTV/Organ | Dose-Volume constraint |
|---|---|
PTV1 (65Gy prescribed in 30 fractions) | 99% volume more than 90% of the dose 95% volume more than 95% of the dose 5% volume less than 105% of the dose 2% volume less than 107% of the dose |
PTVLR (54Gy prescribed in 30 fractions) | 99% volume more than 90% of the dose 95% volume more than 95% of the dose |
PRV Spinal cord | The dose for 1% of the volume is limited to 44Gy and no part should receive more than 48 Gy |
PRV Brainstem | 48 Gy was restricted to no more than 1% of the volume |
Optic Nerve | 50 Gy was restricted to no more than 1% of the volume |
Optic Chiasm | 50 Gy was restricted to no more than 1% of the volume |
Parotids | The maximum mean dose is limited to 24 Gy |
Larynx | The maximum mean dose is limited to 40 Gy |