Table 2 Differences among the three methods with regard to the DVH parameters
Parameters | P-values | ||||
|---|---|---|---|---|---|
Overall | 3DCRT vs. IMRT | 3DCRT vs. RA | IMRT vs. RA | ||
PTV | D1% (Gy) | 0.003 | 3DCRT > IMRT** | 3DCRT > RA** | − |
D99% (Gy) | 0.803 | − | − | − | |
V95% (%) | 0.533 | − | − | − | |
V107% (%) | 0.005 | 3DCRT > IMRT* | 3DCRT > RA* | − | |
EUD (Gy) | 0.012 | 3DCRT > IMRT* | 3DCRT > RA* | _ | |
HI | 0.03 | 3DCRT > IMRT* | 3DCRT > RA* | − | |
CI | 0.001 | 3DCRT < IMRT* | 3DCRT < RA* | − | |
Normal liver | Dmean (Gy) | 0.058 | 3DCRT > IMRT** | − | − |
V30 (%) | 0.006 | − | 3DCRT > RA** | IMRT > RA** | |
Left kidney | Dmean (Gy) | 0.335 | − | − | − |
V20 (%) | 0.137 | − | 3DCRT > RA* | − | |
Right kidney | Dmean (Gy) | 0.912 | − | − | − |
V20 (%) | 0.005 | − | 3DCRT > RA** | − | |
Small bowel | Dmean (Gy) | 0.657 | − | − | − |
V30 (%) | 0.075 | − | − | − | |
V40 (%) | 0.453 | − | − | − | |
Spinal cord | D1% (Gy) | 0.011 | − | 3DCRT > RA* | IMRT > RA* |
MU | 0.001 | IMRT > 3DCRT** | IMRT > RA** | ||