PTV Dynamic Static 5 levels Static 10 levels Static 20 levels
Dmax 106.4 ± 2.0 109.5 ± 2.2
(0.0003)*
107.2 ± 2.5
(0.042)
106.5 ± 2.1
(0.635)
Dmin 84.7 ± 6.1 85.7 ± 3.5
(0.690)
85.8 ± 2.7
(0.625)
86.0 ± 3.1
(0.553)
V95 98.2 ± 1.5 96.3 ± 2.0
(0.005)*
97.4 ± 1.2
(0.116)
97.7 ± 1.0
(0.124)
Homogeneity index 1.9 ± 0.7 2.9 ± 0.8
(0.0002)*
2.2 ± 0.6
(0.094)
2.0 ± 0.5
(0.429)
Values are mean (%) ± standard deviation, ( ) - p values, * - Statistically significant
Table 1: Target dose values for dynamic and static IMRT plans for head and neck cancers.v