Table 4.
Organs at risk
| Index | PSW (Gy(RBE)) | PSWO (Gy(RBE)) | IMPT (Gy(RBE)) |
|---|---|---|---|
| Left cochlea (mean) |
36.4 ± 1.3 |
36.7 ± 1.0 |
28.6 ± 3.3† |
| Right cochlea (mean) |
36.4 ± 1.4 |
36.7 ± 0.9 |
27.4 ± 1.5† |
| Left lens (max) |
22.2 ± 5.5 |
24.8 ± 6.1* |
12.5 ± 4.0† |
| Right lens (max) |
22.8 ± 5.2 |
25.2 ± 5.9* |
12.9 ± 5.0† |
| Brainstem (max) | 39.3 ± 2.0 | 38.8 ± 2.0* | 38.4 ± 0.5 |
Abbreviations: PSW passive scatter with compensator; PSWO passive scatter without compensator; IMPT intensity modulated proton therapy; Data presented as mean ± standard deviation; *significant vs. PSW, †significant vs. PSW or PWO, (p < 0.05), Student’s t-test with Bonferroni correction for multiple comparisons.