Table 4.
The comparison of plan robustness using the width of DVH index bands
| DVH index | VMAT | IMPT | P‐value |
|---|---|---|---|
| CTV D95% (normalized) | 1.2% | 2.5% | 0.0061 |
| CTV D2 cc (normalized) | 1.8% | 2.0% | 0.75 |
| CTV D5%‐D95% (normalized) | 2.3% | 3.1% | 0.13 |
| Total lung V5 Gy[RBE] (%) | 3.89% | 6.56% | 0.026 |
| Total lung V20 Gy[RBE] (%) | 2.23% | 3.41% | 0.053 |
| Total lung Dmean (Gy[RBE]) | 0.79 | 1.70 | 0.0007 |
| Esophagus V60 Gy[RBE] (%) | 4.96% | 3.81% | 0.84 |
| Esophagus Dmean (Gy[RBE]) | 3.93 | 4.00 | 0.67 |
| Heart V50 Gy[RBE] (%) | 1.30% | 0.85% | 0.54 |
| Heart Dmean (Gy[RBE]) | 2.62 | 1.48 | 0.0035 |
| Spinal cord Dmax (Gy[RBE]) | 4.43 | 9.34 | 0.035 |
Bold values represent significant difference between IMPT and VMAT DVH indices.