Table 5. Summary of results for the DVH based analysis for OARs ().
| OARs | Parameter | IMRT | VMAT | HT | P value | ||
|---|---|---|---|---|---|---|---|
| IMRT vs. VMAT | VMAT vs. HT | IMRT vs. HT | |||||
| Left lens PRV | Dmax | 11.27±3.27 | 12.97±2.22 | 11.60±1.36 | 0.044 | 0.008 | 0.027 |
| Dmean | 6.77±1.65 | 9.51±1.64 | 6.93±1.38 | 0.000 | 0.003 | 0.001 | |
| Right lens PRV | Dmax | 10.45±3.51 | 13.05±2.50 | 11.49±1.50 | 0.001 | 0.033 | 0.019 |
| Dmean | 6.63±1.49 | 9.42±1.53 | 6.83±1.30 | 0.000 | 0.001 | 0.037 | |
| Optic chiasm | Dmax | 43.74±5.61 | 46.45±5.00 | 42.42±5.90 | 0.001 | 0.019 | 0.009 |
| Dmean | 40.98±4.74 | 43.64±4.35 | 40.95±4.49 | 0.002 | 0.013 | 0.004 | |
| Left optic nerve | Dmax | 37.02±4.28 | 36.76±0.73 | 36.08±0.81 | 0.011 | 0.016 | 0.045 |
| Dmean | 32.70±2.89 | 31.34±1.57 | 31.20±0.82 | 0.059 | 0.025 | 0.029 | |
| Right optic nerve | Dmax | 37.47±3.05 | 36.80±1.96 | 36.74±3.13 | 0.040 | 0.039 | 0.024 |
| Dmean | 34.70±4.80 | 31.72±1.82 | 31.22±1.41 | 0.002 | 0.008 | 0.049 | |
| Pituitary | Dmax | 42.62±6.28 | 45.43±4.93 | 42.79±5.37 | 0.091 | 0.006 | 0.151 |
| Dmean | 40.92±5.49 | 43.39±4.22 | 40.75±4.81 | 0.027 | 0.004 | 0.362 | |
| Brainstem PRV | Dmax | 54.04±1.53 | 54.45±1.64 | 53.86±1.42 | 0.176 | 0.036 | 0.027 |
| Dmean | 48.95±2.98 | 49.61±2.39 | 48.77±2.68 | 0.050 | 0.042 | 0.037 | |
| Spinal cord | Dmax | 37.82±2.37 | 38.20±2.86 | 41.54±3.24 | 0.151 | 0.010 | 0.054 |
| Dmean | 30.00±4.04 | 29.80±3.65 | 29.39±2.86 | 0.087 | 0.103 | 0.052 | |
| Esophagus | Dmax | 24.07±4.49 | 26.21±3.83 | 24.18±4.38 | 0.006 | 0.829 | 0.022 |
| Dmean | 15.05±3.03 | 18.95±3.44 | 18.51±4.09 | 0.000 | 0.393 | 0.001 | |
| Heart | Dmax | 16.03±3.37 | 19.68±3.06 | 19.42±3.98 | 0.000 | 0.777 | 0.002 |
| Dmean | 5.90±1.52 | 8.49±1.53 | 8.41±1.93 | 0.000 | 0.870 | 0.000 | |
| Left lung | Dmax | 23.30±3.75 | 21.97±4.68 | 23.93±3.22 | 0.053 | 0.005 | 0.112 |
| Dmean | 5.27±0.92 | 3.40±0.98 | 4.12±1.10 | 0.000 | 0.028 | 0.000 | |
| Right lung | Dmax | 23.90±3.76 | 22.98±3.42 | 25.14±2.71 | 0.056 | 0.000 | 0.023 |
| Dmean | 5.69±0.89 | 4.39±0.95 | 5.05±1.13 | 0.000 | 0.016 | 0.007 | |
| Liver | Dmax | 19.09±5.04 | 19.87±3.60 | 18.73±3.60 | 0.047 | 0.164 | 0.641 |
| Dmean | 5.38±0.83 | 5.62±0.73 | 5.02±0.42 | 0.257 | 0.001 | 0.383 | |
| Left kidney | Dmax | 17.13±4.83 | 14.21±3.60 | 16.72±3.81 | 0.001 | 0.003 | 0.624 |
| Dmean | 5.54±1.89 | 2.91±0.87 | 3.91±1.35 | 0.000 | 0.000 | 0.001 | |
| Right kidney | Dmax | 17.22±5.05 | 14.11±3.61 | 15.13±4.06 | 0.000 | 0.028 | 0.166 |
| Dmean | 5.48±2.05 | 2.75±1.25 | 3.70±1.32 | 0.000 | 0.003 | 0.000 | |
| Bowel | Dmax | 26.32±4.21 | 26.99±4.41 | 25.38±3.69 | 0.009 | 0.007 | 0.026 |
| Dmean | 6.07±1.58 | 7.25±1.62 | 8.17±180 | 0.000 | 0.021 | 0.000 | |
DVH, dose-volume histogram; OAR, organ at risk; PRV, planning risk organ volume; IMRT, intensity-modulated radiotherapy; VMAT, volume-modulated arc therapy; HT, helical tomotherapy.