Table 2.
Mean and standard deviations of dose parameters in three treatment techniques.
| Variables |
TD Mean (SD) |
HT Mean (SD) |
VMAT Mean (SD) |
P‐value |
|---|---|---|---|---|
| CW only | ||||
| ‐PTV CW | ||||
| V95% | 95.3 (0.7) | 98.8 (0.6) | 95.5 (1.6) | <0.01 |
| HI | 0.153 (0.015) | 0.089 (0.009) | 0.142 (0.012) | <0.01 |
| CI | 0.709 (0.122) | 0.808 (0.079) | 0.768 (0.119) | <0.01 |
| CW + SPC | ||||
| ‐PTV CW | ||||
| V95% | 95.7 (0.8) | 97.4 (0.8) | 95.6 (0.7) | <0.01 |
| HI | 0.149 (0.012) | 0.101 (0.020) | 0.174 (0.024) | <0.01 |
| CI | 0.657 (0.130) | 0.816 (0.089) | 0.788 (0.112) | <0.01 |
| ‐PTV RNI | ||||
| V95% | 98.8 (0.7) | 99.8 (0.2) | 98.6 (1.4) | <0.01 |
| HI | 0.085 (0.021) | 0.071 (0.011) | 0.152 (0.065) | <0.01 |
| CW + SPC + AXLN | ||||
| ‐PTV CW | ||||
| V95% | 95.7 (0.4) | 97.1 (0.9) | 95.3 (0.5) | <0.01 |
| HI | 0.144 (0.014) | 0.112 (0.012) | 0.176 (0.023) | <0.01 |
| CI | 0.683 (0.189) | 0.790 (0.101) | 0.761 (0.106) | <0.01 |
| ‐PTV RNI | ||||
| V95% | 98.9 | 99.7 | 98.1 | <0.01 |
| HI | 0.088 (0.019) | 0.063 (0.011) | 0.112 (0.027) | <0.01 |
Abbreviations: AXLN, axillary nodes; CI, conformity index; CW, chest wall; HI, homogeneity index; HT, TomoHelical; PTV, planning target volume; RNI, regional nodes; SPC, supraclavicular lymph nodes; TD, TomoDirect; VMAT, volumetric modulated arc therapy.