TABLE 3.
DVH indices and differences (prediction‐MC) of five plan dose distributions from Model 2 and MC simulation. Prescription dose 74 Gy.
| PTV | Bladder | Rectum | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| D2% (Gy) | D95% (Gy) | D2% (Gy) | V60Gy (%) | V65Gy (%) | D2% (Gy) | V50Gy (%) | V60Gy (%) | V65Gy (%) | ||
| Plan 1 (P002) | Model 2 | 77.3 | 70.0 | 71.2 | 11.0 | 8.2 | 72.4 | 28.7 | 13.3 | 9.1 |
| MC | 77.3 | 70.4 | 72.1 | 12.1 | 8.5 | 72.8 | 28.7 | 13.6 | 9.4 | |
| Difference | 0.0 | −0.4 | −0.9 | −1.1 | −0.3 | −0.4 | 0.0 | −0.3 | −0.3 | |
| Plan 2 (P006) | Model 2 | 77.4 | 70.2 | 74.1 | 9.0 | 6.9 | 74.1 | 32.0 | 15.8 | 11.4 |
| MC | 77.4 | 70.4 | 74.0 | 8.9 | 6.9 | 73.9 | 32.0 | 16.0 | 11.6 | |
| Difference | 0.0 | −0.2 | 0.1 | 0.1 | 0.0 | 0.2 | 0.0 | −0.2 | −0.2 | |
| Plan 3 (P005) | Model 2 | 77.0 | 69.9 | 71.9 | 10.0 | 7.5 | 70.7 | 12.9 | 8.4 | 5.6 |
| MC | 77.5 | 70.4 | 72.1 | 10.1 | 7.9 | 71.2 | 12.9 | 8.8 | 6.0 | |
| Difference | −0.5 | −0.5 | −0.2 | −0.1 | −0.4 | −0.5 | 0.0 | −0.4 | −0.4 | |
| Plan 4 (P008) | Model 2 | 79.0 | 70.2 | 75.8 | 13.6 | 10.9 | 70.2 | 13.8 | 8.1 | 5.2 |
| MC | 78.9 | 70.4 | 76.0 | 13.9 | 11.4 | 70.0 | 13.8 | 8.1 | 5.0 | |
| Difference | −0.1 | −0.2 | −0.2 | −0.3 | −0.5 | 0.2 | 0.0 | 0.0 | 0.2 | |
| Plan 5 (P009) | Model 2 | 78.3 | 70.3 | 76.1 | 25.4 | 20.6 | 71.7 | 17.0 | 11.2 | 7.8 |
| MC | 78.6 | 70.4 | 75.9 | 25.4 | 20.7 | 71.8 | 17.0 | 11.3 | 8.0 | |
| Difference | −0.3 | −0.1 | 0.2 | 0.0 | −0.1 | −0.1 | 0.0 | −0.1 | −0.2 | |
Abbreviations: DVH, dose volume histogram; MC, Monte Carlo; PTV, planning training volume.