Table 1.
Dose to the organs at risk (OAR) in IMRT treatment plans (54 Gy total dose)
| Parameter | CT-MRI (Gy, median, range) | CT-MRI-PET (Gy, median, range) | p-value |
|---|---|---|---|
| Brain Stem | |||
| Dmax | 52.4 (39.8–55.3) | 51.4 (39.7–54.7) | 0.007* |
| Dmedian | 11.9 (2.8–22.4) | 5.5 (3.7–16.1) | 0.037* |
| Optic Chiasm | |||
| Dmax | 52.5(5.7–55.2) | 51.0 (5.0–53.5) | 0.007* |
| Dmedian | 39.9 (2.8–53.5) | 37.9 (2.4–49.9) | 0.203 |
| Left optic nerve | |||
| Dmax | 53.8 (3.1–56.1) | 52.3 (3.1–54.6) | 0.017* |
| Dmedian | 40.9 (1.5–52.6) | 37.1 (1.5–52.9) | 0.063 |
| Right optic nerve | |||
| Dmax | 49.5 (1.5–55-7) | 48.4 (1.5–55.0) | 0.022* |
| Dmedian | 28.2 (0.8–54.0) | 24.7 (0.8–53.2) | 0.047* |
*Significant difference <0.05