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Table 2 Dose-volume parameters according to treatment (N = 30)
| Characteristics | X-ray (n = 22) | Proton (n = 8) | p value |
|---|---|---|---|
| Clinical target volume (cm3) | 73.3 ± 52.6 | 206.1 ± 100.6 | 0.007 |
| Total lung | |||
| Mean dose (cGy or CcGE) | 809.8 ± 368.1 | 796.9 ± 475.2 | 0.938 |
| V5 (%) | 28.4 ± 9.7 | 23.1 ± 11.6 | 0.216 |
| V10 (%) | 19.8 ± 8.8 | 18.7 ± 10.5 | 0.782 |
| V20 (%) | 13.1 ± 8.1 | 14.3 ± 8.6 | 0.717 |
| Heart | |||
| V45 (%) | 0.2 ± 0.5 | 0.1 ± 0.2 | 0.855 |
| Esophagus | |||
| Maximum dose (cGy or CcGE) | 1588.5 ± 1030.2 | 1261.4 ± 1216.3 | 0.469 |
| Mean dose (cGy or CcGE) | 408.0 ± 301.4 | 257.9 ± 304.6 | 0.239 |
| Spinal cord | |||
| Maximum dose (cGy or CcGE) | 1141.4 ± 761.5 | 1487.0 ± 1491.0 | 0.548 |
