Table 2 Results of margin validation
From: Analytical setup margin for spinal stereotactic body radiotherapy based on measured errors
Five-fraction plan | Single-fraction plan | ||||
|---|---|---|---|---|---|
No margin (%) | Current margin 2 mm isotropic (%) | Analytical margin 2.4 mm isotropic (%) | Analytical margin 2.4 mm SI only (%) | Analytical margin 3.6 mm SI only (%) | |
> Rx dose to > 90% of CTV | 81 | 100 | 100 | 96 | 95 |
< Max tolerance dose to cord | 100 | 100 | 100 | 100 | 99 |
< Tolerance dose to < 10% of cord | 99 | 99 | 99 | 100 | 95 |
Passing all criteria | 81 | 99 | 99 | 96 | 93 |