Table 5.
EUDs of all structures concerned in the fluence-map optimizations with three different methods. This shows that the reweighted TV can preserve the critical structures to similar extent to the existing techniques, even with fewer segments applied to the treatment planning.
| Patient case | Structures | Algorithms |
||
|---|---|---|---|---|
| Quadratic | TV | Reweighted TV | ||
| Prostate1 | PTV | 81.28 | 81.04 | 80.99 |
| Rectum | 45.09 | 44.59 | 44.06 | |
| Bladder | 13.25 | 13.13 | 13.11 | |
| Femoral heads (L,R) | 16.05/14.83 | 15.81/15.33 | 15.91/15.21 | |
| Prostate2 | PTV | 81.41 | 81.07 | 81.02 |
| Rectum | 46.97 | 46.55 | 46.80 | |
| Bladder | 13.21 | 12.89 | 12.79 | |
| Femoral heads (L,R) | 16.57/16.21 | 16.67/16.51 | 16.94/16.34 | |
| Lung | PTV | 53.30 | 52.78 | 52.66 |
| Chest wall | 6.51 | 6.40 | 6.18 | |
| Spinal cord | 28.72 | 29.15 | 29.29 | |
| HN1 | PTV | 69.99 | 69.55 | 69.52 |
| Spinal cord | 16.90 | 16.00 | 15.83 | |
| Brain stem | 15.27 | 14.54 | 13.95 | |
| Parotid (L) | 11.97 | 11.30 | 11.49 | |
| HN2 | PTV66 | 70.47 | 70.66 | 70.16 |
| PTV54 | 58.27 | 58.16 | 57.56 | |
| Spinal cord | 27.87 | 27.60 | 27.83 | |
| Brain stem | 26.23 | 25.63 | 25.76 | |
| Parotid (L) | 10.95 | 10.92 | 10.74 | |