Normal Tissues Dynamic Static 5 levels Static 10 levels Static 20 levels
Spinal cord Dmax 81.1 ± 8.3 84.0 ± 9.8
(0.069)
81.2 ± 8.2
(0.918)
81.0 ± 8.4
(0.773)
Dmean 44.7 ± 4.8 44.8 ± 4.5
(0.280)
44.7 ± 4.7
(0.871)
44.6 ± 4.7
(0.298)
D50 51.9 ± 17.4 51.3 ± 16.6
(0.370)
52.1 ± 17.6
(0.324)
51.7 ± 17.5
(0.202)
Heart Dmax 101.3 ± 5.3 104.9 ± 4.5
(0.011)
102.4 ± 5.7
(0.028)
101.2 ±5.3
(0.541)
Dmean 58.3 ± 10.4 58.0 ± 10.8
(0.419)
57.9 ± 10.6
(0.048)
57.9 ± 10.55
(0.045)
D50 56.9 ± 10.5 56.8 ± 11
(0.732)
56.7 ± 10.6
(0.065)
56.6 ± 10.8
(0.067)
L lung Dmax 101.7 ± 3.1 104.4 ± 2.3
(0.094)
102.1 ± 3.1
(0.365)
101.8 ± 3.14
(0.140)
Dmean 39.9 ± 5.9 39.2 ± 6.1
(0.067)
39.5 ± 5.9
(0.019)
39.6 ± 5.9
(0.047)
D50 37.1 ± 7.2 36.5 ± 7.4
(0.021)
36.6 ± 7.2
(0.038)
36.7 ± 7.2
(0.011)
R lung Dmax 102.7 ± 0.8 106.4 ± 1.6
(0.014)
102.4 ± 5.7
(0.326)
103.1 ± 0.5
(0.136)
Dmean 36.2 ± 4.2 35.7 ± 4.0
(0.071)
35.9 ± 4.2
(0.024)
35.4 ± 4.2
(0.041)
D50 31.1 ± 4.7 30.5 ± 4.7
(0.017)
30.9 ± 4.8
(0.303)
30.8 ± 4.8
(0.060)
Values are mean (%) ± standard deviation, ( ) - p values, * - Statistically significant
Table 6: Normal tissue dose values for dynamic and static IMRT plans for ca esophagus.