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Four-parameter model of systematic and random residual error (mm) in CTV centroid position after GTV-based localization
| CTV5mm | CTV8mm | |||||
|---|---|---|---|---|---|---|
| LR (mm) | AP (mm) | SI (mm) | LR (mm) | AP (mm) | SI (mm) | |
| M | 0.2 | −0.1 | 0.2 | −0.1 | −0.1 | 0.2 |
| Σ | 0.9 | 1.5 | 1.8 | 1.0 | 1.4 | 1.5 |
| σ | 0.6 | 0.8 | 0.5 | 0.6 | 0.9 | 1.6 |
| Σ(σ) | 0.8 | 1.3 | 0.7 | 0.9 | 1.0 | 2.6 |
Abbreviations: M: Group mean error; Σ: systematic error; σ: random error; Σ(σ): standard deviation of individual patient deviations; LR: left/right; AP: anterior/posterior; SI: superior/inferior.
