| Structures | E5 | E10 | E20 | |||
| Average gamma | SD | Average gamma | SD | Average gamma | SD | |
| PTV | 0.35 | 0.07 | 0.33 | 0.08 | 0.30 | 0.09 |
| Cord | 0.26 | 0.06 | 0.25 | 0.08 | 0.24 | 0.07 |
| Heart | 0.29 | 0.12 | 0.28 | 0.12 | 0.26 | 0.11 |
| Total lung | 0.26 | 0.08 | 0.26 | 0.07 | 0.24 | 0.07 |