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| Dose errors | MLC errors (mm) | Gantry Angle errors (˚) | Col Angle errors (˚) | |||||||||||||
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| −1% | −3% | −5% | 1% | 3% | 5% | −0.25 | −0.5 | 0.25 | 0.5 | 1.5 | 2.5 | 1 | 2 | 3 | 1 | 4 |
3D Gamma index | 100 | 99.09 | 96.79 | 100 | 99.39 | 97.69 | 99.99 | 98.67 | 99.99 | 98.87 | 77.37 | 69.26 | 99.9 | 98.4 | 95.63 | 100 | 100 | ||
Average 3D gamma | PTV | 0.51 | 1.33 | 2.15 | 0.43 | 1.19 | 1.92 | 0.43 | 0.88 | 0.45 | 0.84 | 2.31 | 3.62 | 0.08 | 0.14 | 0.19 | 0.02 | 0.04 | |
Rectum | 0.33 | 0.7 | 1.13 | 0.28 | 0.57 | 1.04 | 0.49 | 0.9 | 0.51 | 0.9 | 2.53 | 4.11 | 0.23 | 0.39 | 0.54 | 0.03 | 0.03 | ||
Bladder | 0.27 | 0.59 | 0.92 | 0.19 | 0.66 | 0.87 | 0.46 | 0.88 | 0.48 | 0.86 | 2.46 | 4.01 | 0.17 | 0.27 | 0.36 | 0.02 | 0.03 | ||
% difference | PTV | D95 | −1.07 | −3.07 | −5.08 | 0.86 | 2.96 | 4.92 | −1.49 | −3.17 | 1.53 | 2.96 | 8.25 | 11.77 | −0.03 | −0.24 | −0.22 | 0.02 | 0.07 |
Rectum | D50 | −1.23 | −3 | −4.83 | 0.73 | 3 | 4.69 | −2.11 | −4.05 | 2.23 | 4.49 | 14.26 | 29.05 | −0.34 | −0.78 | −0.68 | 0.02 | 0 | |
D60 | −1.3 | −3.25 | −8.07 | 0.91 | 2.86 | 4.50 | −2.20 | −4.76 | 2.09 | 3.84 | 10.39 | 17.33 | −0.02 | −0.04 | −0.01 | 0.02 | 0.04 | ||
D70 | −1 | −2.28 | −4.24 | 0.57 | 2.24 | 3.99 | −1.15 | −2.06 | 1.19 | 2.69 | 13.92 | 24.77 | −0.26 | −0.21 | −0.37 | 0 | 0.02 | ||
D74 | −1.51 | −2.63 | −2.74 | 1.27 | 2.82 | 3.97 | −1.27 | −2.25 | 1.42 | 2.57 | 8.11 | 18.83 | −0.15 | 0.04 | −0.08 | 0.09 | 0.18 | ||
Bladder | D60 | −0.85 | −2.65 | −5.66 | 0.5 | 1.87 | 3.05 | −1.67 | −3.88 | 1.44 | 2.84 | 8.61 | 14.21 | 0.04 | −0.09 | 0.09 | 0.01 | −0.02 | |
D70 | −1.12 | −7.24 | −11.0 | 0.64 | 2.31 | 3.53 | −1.9 | −6.57 | 1.65 | 2.85 | 8.72 | 16.11 | −0.15 | −0.21 | −0.09 | −0.02 | 0 | ||
D74 | −0.12 | −0.12 | −0.12 | 0.32 | 5.82 | 10.39 | −0.12 | −0.12 | 1.21 | 5.57 | 14.7 | 21.03 | −0.02 | 0.01 | 0.06 | −0.01 | −0.04 |