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Table 2 Corrections in 3 and 6 DOF; σc: centered standard deviation

From: Robotic-based carbon ion therapy and patient positioning in 6 degrees of freedom: setup accuracy of two standard immobilization devices used in carbon ion therapy and IMRT

corrections in 6 DOF      
  Scotchcast head mask   thermoplastic head mask  
  mean sigma p-value mean sigma p-value
longitudinal (mm) 1.2 1.3 0.046 0.0 1.9 0.836
lateral (mm) -0.3 1.0 0.153 0.5 1.6 0.127
vertical (mm) 0.4 0.8 0.113 1.2 1.2 0.047
iso (°) 0.3 0.6 0.142 -0.1 0.9 0.396
pitch (°) 0.3 0.8 0.148 0.4 1.1 0.119
roll (°) 0.2 0.6 0.175 -0.2 1.2 0.258
overall displacement vector (mm) 2.1    2.55   
   sigma c    sigma c  
longitudinal (mm)   0.8    1.3 < 0.001
lateral (mm)   0.6    0.9 < 0.001
vertical (mm)   0.6    0.7 0.062
iso (°)   0.4    0.5 0.019
pitch (°)   0.5    0.7 < 0.001
roll (°)   0.4    0.6 < 0.001
corrections in 3 DOF      
  Scotchcast head mask   thermoplastic head mask  
  mean sigma p-value mean sigma p-value
longitudinal (mm) 0.4 2.3 0.133 0.6 1.9 0.107
lateral (mm) -0.4 1.9 0.122 1.1 1.8 0.055
vertical (mm) -0.4 2.3 0.145 0.00 1.8 1.000
   sigma c    sigma c  
longitudinal (mm)   1.4    1.0 < 0.001
lateral (mm)   1.3    1.0 < 0.001
vertical (mm)   1.2    1.1 0.096
overall displacement vector (mm) 3.5    3.0