Table 2.
Summary of PTV coverage data for VMAT-S, IMRT and HT plans
| PTV 95 (%) | PTV 100 (%) | PTV 105 (%) | PTV 110 (%) | D mean (Gy) | CI | HI | |
|---|---|---|---|---|---|---|---|
|
Mean (VMAT-S) |
99.82 |
95.10 |
40.50 |
0.00 |
52.01 |
0.89 |
1.06 |
|
Mean (IMRT) |
99.91 |
95.60 |
67.10 |
5.30 |
52.51 |
0.87 |
1.10 |
|
P
|
0.53 |
0.68 |
0.03 |
0.01 |
0.51 |
0.07 |
0.01 |
|
Mean (HT) |
99.61 |
95.80 |
16.70 |
0.20 |
51.45 |
0.87 |
1.07 |
| P | 0.37 | 0.83 | 0.00 | 0.71 | 0.08 | 0.06 | 0.25 |
PTV: planning target volume, VMAT-S: volumetric modulated arc therapy with SmartArc, IMRT: intensity-modulated radiotherapy, HT: helical tomotherapy, Dmean: mean dose, CI: conformity index, HI: homogeneity index.