Table 8.
Mean dose and EUD for PTV's and OAR's in IMRT versus 3D-CRT
| Mean Dose | EUD | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| IMRT | 3D-CRT | p | IMRT | 3D-CRT | p | |||||
| mean | SD | mean | SD | mean | SD | mean | SD | |||
| PTV 1 | 68.76 | ± 1.88 | 64.40 | ± 2.79 | 0.61 | 68.34 | ± 1.93 | 67.29 | ± 2.85 | 0.2 |
| PTV 2 | 60.68 | ± 0.63 | 61.00 | ± 0.78 | 0.03 | 59.92 | ± 0.95 | 55.30 | ± 4.33 | <0.01 |
| Brain | 25.57 | ± 3.24 | 22.90 | ± 4.31 | <0.01 | 41.57 | ± 2.16 | 41.73 | ± 3.12 | 0.69 |
| Brainstem | 13.76 | ± 8.74 | 13.37 | ± 9.25 | 0.79 | 21.83 | ± 11.91 | 22.49 | ± 12.94 | 0.48 |
| Chiasm | 18.51 | ± 12.56 | 15.83 | ± 13.33 | 0.14 | 19.64 | ± 13.2 | 16.95 | ± 13.71 | 0.12 |
| Optic nerve rt. | 8.48 | ± 6.49 | 7.57 | ± 8.66 | 0.64 | 10.2 | ± 7.76 | 8.81 | ± 9.49 | 0.41 |
| Optic nerve lt. | 13.02 | ± 16.94 | 13.50 | ± 14.33 | 0.79 | 14.07 | ± 12.74 | 14.57 | ± 14.65 | 0.78 |