1395 / 1609
38
PDR H&N
prognostic factors
•
2000 à 2004 : 210 pts
•
Implantation : Paris System
•
MCD 100% and Reference : 85%
•
Pulse: 0.5 Gy/h
Winfrid J. Melzner, Radiotherapy and Oncology 82 (2007) 167–173.
• Local Control : 80% at 4 year
– Quality index < 1.72
(p = 0,02)
– intersource distance < 11.8 mm
(p= 0,01)
• Soft tissues necrosis : 11%
– V85 > 26,8 ml
(p = 0,01)
– Quality index > 1,72
(p = 0,04)
– intersource distance > 16,9 mm
(p= 0,07)
• ORN : 7,6%
– Prescribed Dose : > 0.64 Gy/h
(p= 0,03)
– High dose > 80,3 Gy/h
(p= 0,04)