Table 2.
OAR doses for all orbital primary patients
| Orbit | Orbital Primary (n=12) | ||||
|---|---|---|---|---|---|
| Structure | Dose | Proton | IMRT | % Spared | P Value |
| LensIpsi | Mean (Gy) | 26 | 32 | 19 | 0.19 |
| V5 (%) | 89 | 99 | 10 | 0.10 | |
| LensContra | Mean (Gy) | 0 | 3 | 100 | < 0.01 |
| V5 (%) | 0 | 23 | 100 | 0.05 | |
| RetinaIpsi | Mean (Gy) | 33 | 40 | 18 | < 0.01 |
| V45 (%) | 34 | 48 | 0.09 | ||
| RetinaContra | Mean (Gy) | 0.1 | 8 | 99 | < 0.01 |
| V20 (%) | 0 | 11 | 100 | 0.04 | |
| Optic NerveIpsi | Mean (Gy) | 31 | 37 | 16 | 0.03 |
| V45 (%) | 33 | 40 | 18 | 0.27 | |
| Lacrimal GlandIpsi | Mean (Gy) | 19 | 35 | 46 | < 0.01 |
| V30 (%) | 31 | 65 | 52 | < 0.01 | |
| Lacrimal GlandContra | Mean (Gy) | 0 | 5 | 100 | < 0.01 |
| Hypothalamus | Mean (Gy) | 1 | 8 | 88 | < 0.01 |
| V16 (%) | 3 | 13 | 77 | 0.02 | |
| Pituitary | Mean (Gy) | 4 | 15 | 73 | < 0.01 |
| V20 (%) | 5 | 19 | 74 | 0.10 | |
| Temp LobeIpsi | Mean (Gy) | 1 | 9 | 89 | < 0.01 |
| V20 (%) | 2 | 10 | 80 | < 0.01 | |
| Temp LobeContra | Mean (Gy) | 0 | 4 | 100 | < 0.01 |
| V10 (%) | 0 | 7 | 100 | 0.03 | |
| Maxilla | Mean (Gy) | 7 | 12 | 42 | 0.02 |
| V20 (%) | 15 | 25 | 40 | 0.05 | |
| Skin | DMax (Gy) | 43 | 42 | −2 | 0.68 |
Abbreviations: ipsi, ipsilateral; contra, contralateral, temp; temporal.