Table 1.
Treatment plan comparison for prostate cancer
| Structure | Parameter | DVO | Single arc | IMRT |
|---|---|---|---|---|
| PTV | D50% | Uniform | 60.0 Gy | 59.9 Gy |
| H | Dose | 5.5 | 7.0 | |
| V95% | 60 Gy | 99.9% | 97.2% | |
| Normal Tissue | D1% | ≤ 60.0 Gy | 60.0 Gy | 59.9 Gy |
| D10% | ≤ 30.0 Gy | 29.9 Gy | 31.7 Gy | |
| D25% | ≤ 15.0 Gy | 17.5 Gy | 17.7 Gy | |
| Rectum | D1% | - | 60.7 Gy | 60.2 Gy |
| Rectum - PTV | D1% | ≤ 40.0 Gy | 37.8 Gy | 38.5 Gy |
| Bladder | D1% | - | 61.5 Gy | 62.2 Gy |
| Bladder - PTV | D1% | ≤ 30.0 Gy | 47.4 Gy | 47.4 Gy |
| Left Femoral Head | D50% | - | 28.5 Gy | 29.9 Gy |
| Right Femoral Head | D50% | - | 29.8 Gy | 28.9 Gy |
| Monitor Units | MU/2.0 Gy | - | 695 | 687 |
| Time | Calculation | - | 16:30 min | 2:52 min |
| Delivery | - | 4:45 min | 11:00 min | |
DX% is the dose delivered to X% of the volume in Gy, V95% the volume receiving 95% of the prescription dose in%, Homogeneity H = (D5% - D95%)/Daverage.