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Table 3 The Standard deviation of systematic (∑) and random (σ) errors

From: 4DCT and CBCT based PTV margin in Stereotactic Body Radiotherapy(SBRT) of non-small cell lung tumor adhered to chest wall or diaphragm

  σ
RL AP SI RL AP SI
Centroid point 0.14 0.18 0.55    
Boundary 0.19 0.21 0.17    
Set-up 0.24 0.26 0.43 0.10 0.08 0.20
  1. Symbols: ∑, standard deviation of systematic uncertainties; σ, standard deviation of statistical (random) uncertainties