Table 1.
A summary of recommended settings for robust optimization of craniospinal irradiation.
| Action | Recommendation |
|---|---|
| OTV Expansion from CTV | 0 mm (OTV = CTV) in the brain region; 10 mm sup/inf in the spine to eliminate scalloping; 2 to 4 mm right/left and ant/post in the spine region. |
| STV Expansion from fs_OTV | Desired robustness + spot spacing (i.e., 3 mm + 5 mm), 3% range |
| Plan Perturbations | +/− 3%, +/− 3 mm in each direction |
| Field Perturbations | 5 mm sup/inf for each field in the match regions. |
| Robustly optimized structures | OTV, cribriform brain, optic structures, brainstem, cochlea (optional) |
fs OTV: field specific Optimization Target Volume; CTV: Clinical Target Volume; STV: Scanning Target Volume. +/−: plus/minus.