Table 1.
Dosimetric comparison of PTV for IMRT, VMAT, and Hybrid IMRT/VMAT plans.
| 9F-IMRT | 2ARC-VMAT | Hybrid | Pairwise comparison | |||
|---|---|---|---|---|---|---|
| p α | p β | p γ | ||||
| HI | ||||||
| PTV70 | 0.07 ± 0.03 | 0.08 ± 0.03 | 0.06 ± 0.03 | 0.32 | 0.89 | 0.05 |
| PTV59.4 | 0.16 ± 0.04 | 0.20 ± 0.04 | 0.17 ± 0.04 | 0.00 | 0.92 | 0.01 |
| PTV54 | 0.12 ± 0.02 | 0.14 ± 0.02 | 0.11 ± 0.02 | 0.04 | 0.00 | 0.00 |
| CN | ||||||
| PTV70 | 0.47 ± 0.18 | 0.43 ± 0.12 | 0.62 ± 0.09 | 1.00 | 0.01 | 0.00 |
| PTV59.4 | 0.58 ± 0.09 | 0.60 ± 0.10 | 0.64 ± 0.09 | 0.37 | 0.01 | 0.01 |
| PTV54 | 0.63 ± 0.04 | 0.67 ± 0.05 | 0.69 ± 0.04 | 0.10 | 0.00 | 0.66 |
HI = homogeneity index; CN = conformation number.
p α: 9F-IMRT versus 2ARC-VMAT; p β: 9F-IMRT versus Hybrid; p γ: 2ARC-VMAT versus Hybrid.