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
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 | |