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. 2012 Nov;85(1019):e1051–e1057. doi: 10.1259/bjr/28845176

Table 2. Setup errors.

Parameter X (left–right)
Y (superior–inferior)
Z (anteroposterior)
All data
No correction (cm) Corrected (cm) No correction (cm) Corrected (cm) No correction (cm) Corrected (cm) No correction (cm) Corrected (cm)
Σ 0.27 0.15 0.22 0.12 0.27 0.12 0.29 0.14
σ 0.25 0.3 0.3 0.32 0.24 0.29 0.28 0.31
aMargin 0.8 0.5

Σ, standard deviation of the individual patient systematic errors; σ, mean random error.

aPlanning target volume margin for setup error. Estimate only based on the highlighted values in the table. Does not include residual errors, or those due to deformation.