491 / 1345
Nodal boosting
D98>55Gy
•
CTV-N D98>100% of prescribed dose is a
hard constraint
since the coverage on the edge of PTV-N can be as low as
90% and the margins are small.
•
Hard target coverage constraints overrules soft constraints
e.g. Bowel
CTV N1 D98
0
10
20
30
40
50
60
1 2 3 4 5 6 7 8 9