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Table 2 Modeling of the BrainLAB Imaging couch top (ICT) in the Philips Pinnacle 3 treatment planning system using different combinations of carbon fibers (CF) and foam densities (F) for 10 cm × 10 cm field size

From: A validation of carbon fiber imaging couch top modeling in two radiation therapy treatment planning systems: Philips Pinnacle3 and BrainLAB iPlan RT Dose

  Percentage deviation of Pinnacle3 treatment planning system predicted dose to measured dose
Angle Measured dose (cGy) No Couch CF0.6 CF0.5 CF0.46, CF0.46 CF0.6 CF0.55 CF0.7
    F0.02 F0.03 F0.05 F0.1 F0.1 F0.03 F0.1
180 89.3 1.31 -1.04 -0.26 -0.93 -1.82 -2.83 -0.71 -3.28
170 89.0 0.94 -0.97 -0.30 -0.97 -1.87 -2.77 -0.64 -3.33
160 87.9 1.72 -0.79 -0.10 -0.79 -1.70 -2.72 -0.44 -3.18
150 85.9 1.68 -0.30 0.40 -0.41 -1.46 -2.51 0.05 -2.86
140 82.4 2.67 -0.36 0.49 -0.24 -1.58 -2.79 0.12 -3.28
130 76.7 4.40 0.23 1.27 0.36 -1.21 -2.77 0.75 -3.42
120 67.5 7.12 1.05 2.53 1.19 -0.73 -2.81 1.79 -3.55
110 58.0 5.83 -1.06 0.49 -0.03 -1.23 -3.47 -0.20 -3.82
100 64.5 -0.96 -0.96 -0.96 -0.96 -0.96 -0.96 -0.96 -0.65
Sum   24.72 -4.20 3.56 -2.77 -12.56 -23.63 0.23 -27.36
t-test   0.0059 0.07 0.27 0.18 0.00007 0.000005 0.99 0.00002
  1. Note that the “measured dose (cGy)” is the dose measured as described in phantom dose measurement through the imaging couch top.