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Table III

Estimates and significances of the parameters of the model used for testing the effects of different scanner settings on the calibration.

Slope Intercept


Parameter Estimate Std. Error Significance Parameter Estimate Std. Error Significance


α 1.06E+00 2.56E-03 *** μ 1.07E+03 1.14E+00 ***
α Bone 0.00E+00 μ Bone 0.00E+00
α Bone + –2.26E-03 3.02E-03 ns μ Bone + –1.46E+00 1.35E+00 ns
Reconstruction α Detail –1.21E-03 3.02E-03 ns μ Detail –6.19E-01 1.35E+00 ns
filter α Edge 3.23E-04 3.03E-03 ns μ Edge 3.41E-01 1.35E+00 ns
α Lung –2.13E-02 3.00E-03 *** μ Lung –1.31E+01 1.34E+00 ***
α Soft 9.33E-03 3.04E-03 ** μ Soft 5.53E+00 1.36E+00 ***
α Standard 9.22E-03 3.04E-03 ** μ Standard 5.39E+00 1.36E+00 ***


Voltage α 80kVp 0.00E+00 μ 80kVp 0.00E+00
α 120kVp –6.58E-03 1.62E-03 *** μ 120kVp –1.25E+01 7.21E-01 ***


α 50mA 0.00E+00 μ 50mA 0.00E+00
Intensity α 80mA 9.13E-05 1.98E-03 ns μ 80mA 1.01E-02 8.83E-01 ns
α 200mA –3.09E-05 1.98E-03 ns μ 200mA –1.99E-01 8.83E-01 ns