Table 3.
Average dose to the neurological OARs and proportion of patients not fulfilling dosimetric constraints
| OARs | Dmax (Gy) | D1 (Gy) | Dmax >45 Gy, n (%) | D1 >54 Gy, n (%) | D1 >57 Gy, n (%) | D1 >60 Gy, n (%) | D1 >65 Gy, n (%) |
|---|---|---|---|---|---|---|---|
| Brainstem | 55.7±1.5 | 52.5±2.1 | – | 23 (22.3) | 0 (0) | 0 (0) | – |
| Spinal cord | 43.7±1.1 | 40.5±3.2 | 4 (3.9) | – | – | – | |
| Optic chiasm | 54.0±6.9 | 53.8±6.8 | – | 69 (67.0) | 22 (21.4) | 0 (0) | – |
| Optic nerve | |||||||
| (I) | 51.9±8.3 | 51.8±7.8 | – | 51 (49.5) | 12 (11.7) | 0 (0) | – |
| (C) | 51.4±8.2 | 50.9±8.2 | – | 49 (47.6) | 7 (6.8) | 0 (0) | – |
| Temporal lobe | |||||||
| (I) | 64.9±2.6 | 63.3±1.3 | – | – | – | 99 (96.1) | 4 (3.9) |
| (C) | 64.7±1.3 | 62.3±1.8 | – | – | – | 95 (92.2) | 0 (0) |
Note: All data are presented as the mean ± SD.
Abbreviations: OARs, organs at risk; Dmax, maximum point dose; D1, maximum dose to 1% volume; I, ipsilateral side; C, contralateral side.