Table 2.
Optimization objectives.
| Structure | Limit | Volume (%) | Gray (Gy) | Priority |
|---|---|---|---|---|
| Left femur | Upper | 0 | 45.00 | 50 |
| Right femur | Upper | 0 | 45.00 | 50 |
| External genitalia | Upper | 0 | 30.00 | 70 |
| IMRT bladder | Upper | 50 | 25.00 | 50 |
| IMRT bladder | Upper | 5 | 42.00 | 50 |
| IMRT bladder | Upper | 25 | 30.00 | 50 |
| Large bowel | Upper | 40 | 33.00 | 50 |
| Large bowel | Upper | 60 | 27.00 | 50 |
| Large bowel | Upper | 15 | 35.00 | 50 |
| Small bowel | Upper | 20 | 33.00 | 50 |
| Small bowel | Upper | 40 | 27.00 | 50 |
| Small bowel | Upper | 50 | 22.00 | 50 |
| IMRT PTV45 | Upper | 0 | 48.00 | 70 |
| IMRT PTV45 | Lower | 100 | 47.00 | 70 |
| IMRT PTV52 | Upper | 0 | 56.00 | 95 |
| IMRT PTV52 | Lower | 100 | 55.00 | 100 |
| Bladder | Upper | 0 | 45.00 | 50 |
| Bladder | Upper | 40 | 30.00 | 50 |
IMRT, intensity modulated radiation therapy; PTV45, planning target volume receiving 45 Gy; PTV52, planning target volume receiving 52 Gy.