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Table 2 Final deviations of phantom position compared to planning CT after 6DoF correction with HexaPOD.

From: Semi-robotic 6 degree of freedom positioning for intracranial high precision radiotherapy; first phantom and clinical results

  X(mm) Y(mm) Z(mm) 3D-vector (mm) rot x (°) rot y(°) rot z(°)
M 0.0 ± 0.1 0.1 ± 0.3 0.1 ± 0.2   0.01 ± 0.1 0.06 ± 0.1 0.06 ± 0.1
σ(Mean ± SD) 0.1 ± 0.1 0.3 ± 0.2 0.2 ± 0.1 0.4 ± 0.2 0.08 ± 0.1 0.08 ± 0.1 0.06 ± 0.1
  1. grey value match of CBCT2 with planning CT
  2. group mean error (M)
  3. root mean square of random errors (σ)
  4. Degree of freedom (DoF)