Table 2. PTV parameters .
3D-CRT - three-dimensional conformal radiotherapy, IMRT - intensity-modulated radiotherapy, VMAT - volumetric-modulated arc therapy, PTV - planning target volume
| PARAMETER | 3D-CRT | IMRT | VMAT | P-value | |||||
| MEAN | SD | MEAN | SD | MEAN | SD | 3D-CRT- IMRT | 3D-CRT-VMAT | IMRT-VMAT | |
| D98%(GY) | 40.63 | 3.22 | 45.69 | 0.81 | 46.42 | 0.74 | 0.000 | 0.000 | 0.116 |
| D50%(GY) | 47.97 | 2.02 | 49.80 | 0.28 | 49.99 | 0.32 | 0.000 | 0.000 | 0.839 |
| D2%(GY) | 51.67 | 2.24 | 51.89 | 0.32 | 51.93 | 0.33 | 0.000 | 0.017 | 1.000 |
| D95%(%) | 81.40 | 6.27 | 93.70 | 2.16 | 95.63 | 1.82 | 0.000 | 0.000 | 0.037 |
| D90%(%) | 90.80 | 2.17 | 98.65 | 0.76 | 98.96 | 1.47 | 0.00 | 0.00 | 0.316 |
| V47.5GY(CC) | 540.91 | 106.20 | 769.12 | 212.46 | 805.32 | 219.28 | 0.000 | 0.000 | 0.037 |
| CI | 0.66 | 0.11 | 0.91 | 0.06 | 0.96 | 0.02 | 0.000 | 0.000 | 0.019 |
| HI | 0.23 | 0.05 | 0.12 | 0.02 | 0.11 | 0.02 | 0.000 | 0.000 | 0.097 |
| HOTSPOT-V107%(%) | 0.17 | 0.13 | 0.01 | 0.01 | 0.03 | 0.03 | 0.05 | 0.05 | 0.05 |