Table 2.
Organ-at-risk dosimetry
| Organ at risk | Hard constraint | No. of PI constraint violations | Mean ± SD | Median | Range |
|---|---|---|---|---|---|
| Uninvolved lung | 1500 cm3 <12.5 Gy | NA | NA | NA | NA |
| (lung GTV) | 1000 cm3 <13.5 Gy | NA | NA | NA | NA |
| Trachea max | V50 Gy <0.2 cm3 | 3 | 11.32 ± 1.83 cm3 | 10.97 cm3 | 9.68-13.30 cm3 |
| Bronchial tree max | V50 Gy <0.2 cm3 | NA | NA | NA | NA |
| Esophageal max | V32 Gy ≤0.5 cm3 | 3 | 3.24 ± 1.27 cm3 | 3.09 cm3 | 2.05-4.58 cm3 |
| Heart/pericardium | V32 Gy ≤15 cm3 | 3 | 23.38 ± 6.67 cm3 | 25.66 cm3 | 15.87-28.62 cm3 |
| Cord | V25 Gy <1.0 cm3 | 3 | 1.87 ± 0.09 cm3 | 1.84 cm3 | 1.72-1.89 cm3 |
| Stomach max | V33 ≤0.5 cm3 | 1 | 1.19 cm3 | 1.19 cm3 | NA |
Abbreviations: GTV = gross tumor volume; NA = not applicable; max = maximum; min = minimum; PI = initial nonadaptive plan; SD = standard deviation.