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Population systematic and random errors and necessary CTV to PTV margins
| Population set-up errors | CTV to PTV margins (mm) | ||||
| Direction | Systematic (Σ) | Random (σ) | ICRU 62 (Sqrt Σ2 + σ2) | Stroom (2 Σ + 0.7σ) | van Herk (2.5 Σ + 0.7σ) |
| Antero-Posterior (AP) | 0.96 | 1.94 | 2.16 | 3.28 | 3.76 |
| Medio-Lateral (ML) | 0.98 | 1.97 | 2.20 | 3.34 | 3.83 |
| Supero-Inferior (SI) | 1.20 | 2.48 | 2.76 | 4.14 | 4.74 |
