| Anatomic plan | Functional plan |
---|
Paremeter | FESB | FMOB | P value | FESB | FMOB | P value |
---|
Conformity indexa | 1.01±0.01 | 1.013±0.02 | 0.148 | 1.01±0.02 | 1.02±0.02 | 0.617 |
Homogeneity indexb | 1.06±0.02 | 1.07±0.03 | 0.069 | 1.07±0.02 | 1.07±0.03 | 0.837 |
MUs | 485±202 | 497±207 | 0.403 | 492±189 | 500±223 | 0.682 |
Mean dose (Gy) | 67.11±0.05 | 67.18±0.54 | 0.637 | 67.09±0.40 | 67.04±0.42 | 0.785 |
- Abbreviations: PTV Planning target volume, MUs Monitor units, FESB Five equally-spaced beams, FMOB Five manually optimized beams; Data presented as mean±standard deviation.
- aConformity index = cover factor × spill factor, where cover factor defined as relative PTV volume receiving ≥66 Gy, and spill factor defined as ratio of PTV receiving ≥66 Gy to total volume receiving 66 Gy.
- bHomogeneity index = D5%/D95% , where Dx% is minimum dose in x% of PTV.