1006 / 1161
•
1)
Primary + Positive lymph nods
(GTV + margin)
➢
PTV1:
66 Gy @ 2.2 Gy/fr
•
2)
High risk lymph-nodal compartments
(CTV1 + margin)
(r2, r3, r5)
➢
PTV2:
60 Gy @ 2 Gy/fr
•
3)
Low risk lymph-nodal compartments
(CTV2 + margin)
(r4, l2, l3, l4, l5, r1b, l1b, retropharyngeal)
➢
PTV3:
54 Gy @ 1.8 Gy/fr
PTV prescription: SIB treatment
95%
of Dose at
95%
of volumes
105%
of Dose at
5%
of volumes