| Volume | Metric | IMRT | IMPT | p value | ||
| Average | STDEV | Average | STDEV | |||
| Urethra | ||||||
| Dmean (Gy/CGE) | 103.0% | 1.9% | 104.0% | 1.2% | 0.06 | |
| Femoral Heads | ||||||
| D5% | 55.2% | 8.2% | 40.2% | 1.1% | 0.0003 | |
| Body minus PTV | ||||||
| Dmean (Gy/CGE) | 17.4% | 6.0% | 5.8% | 1.9% | <0.0001 |