978 / 1726
Nodal boosting
D98>55Gy
D98>57.5Gy
•
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
51
52
53
54
55
56
57
58
59
60
1 2 3 4 5 6 7 8 9 10 11 12
CTV N1 D98
CTV N2 D98
50
52
54
56
58
60
62
1 2 3 4 5 6 7 8 9 10 11 12