Table 3.
The comparison of plan quality using DVH indices
| DVH index | VMAT | IMPT | P‐value |
|---|---|---|---|
| CTV D2 cc (normalized) | 105% | 106% | 0.47 |
| CTV D5%–D95% (normalized) | 4.4% | 4.1% | 0.29 |
| Total lung V5 Gy[RBE] (%) | 59.98% | 29.39% | 0.0014 |
| Total lung V20 Gy[RBE] (%) | 24.37% | 20.41% | 0.51 |
| Total lung Dmean (Gy[RBE]) | 13.56 | 10.65 | 0.24 |
| Esophagus V60 Gy[RBE] (%) | 1.18% | 9.63% | 0.47 |
| Esophagus Dmean (Gy[RBE]) | 17.02 | 20.58 | 0.14 |
| Heart V50 Gy[RBE] (%) | 0.83% | 0.83% | 0.64 |
| Heart Dmean (Gy[RBE]) | 6.97 | 1.60 | 0.017 |
| Spinal cord Dmax (Gy[RBE]) | 38.99 | 26.50 | 0.0011 |
Bold values represent significant difference between IMPT and VMAT DVH indices.