From: Primary tumor volume delineation in head and neck cancer: missing the tip of the iceberg?
Objectiveb | Per Protocol | Variation Acceptable | Deviation Unacceptable |
---|---|---|---|
D95% of PTV70 | 70 Gy (100%) | ≤+/-2% | >+/-2% |
D5% of PTV70 | ≤74.9 Gy (107%) | ≤77 Gy (110%) | >77 Gy (110%) |
D98% of PTV70 | ≥66.5 Gy (95%) | ≥63 Gy (90%)a | <63 Gy (90%)a |
Maximum dose (hot spot ≤0.03 cm3) outside the PTV70 | ≤74.9 Gy (107%) | ≤77 Gy (110%) | >77 Gy (110%) |