Table 4 Dose to the organs at risk (OAR) in proton treatment plans (57.6 Gy total dose)
| Parameter |
CT-MRI (Gy, median, range) |
CT-MRI-PET (Gy, median, range) | p-value |
|---|---|---|---|
| Brain Stem | |||
| Dmax | 54.3 (52.3–56.0) | 54.6 (52.4–57.6) | 0.859 |
| Dmedian | 12.5 (0.7–41.5) | 5.7 (0.48–35.8) | 0.008* |
| Optic Chiasm | |||
| Dmax | 53.4 (1.9–55.8) | 53.6 (1.9–55.3) | 0.767 |
| Dmedian | 42.0 (0.3–51.3) | 40.4 (0.3–50.3) | 0.139 |
| Left optic nerve | |||
| Dmax | 53.7 (0.4–57.2) | 53.2 (0.4–57.5) | 0.953 |
| Dmedian | 38.6 (0.0–52.3) | 29.9 (0.0–51.9) | 0.008 |
| Right optic nerve | |||
| Dmax | 52.9 (0.2–53.8) | 52.7 (0.2–55.2) | 0.953 |
| Dmedian | 16.3 (0.0–51.3) | 7.0 (0.0–51.5) | 0.021* |