. Author manuscript; available in PMC: 2025 Jul 8.

Published in final edited form as: Phys Med Biol. 2024 Jul 8;69(14):10.1088/1361-6560/ad5d4a. doi: 10.1088/1361-6560/ad5d4a

Table 3 –

Summary of multivariate regression fit (intercept and slopes) for iodine and gadolinium datasets for each CNR measure. Associated p-values listed in parentheses.

Iodine	CNR_lo	CNR_hi	Covar-CNR_lo	Covar-CNR_hi
Intercept	−2.040 (0,00)	2.214 (0.21)	1.479 (0.00)	−7.633 (0.05)
Tube Voltage	0.002 (0.04)	0.026 (0.04)	0.004 (0.00)	0.100 (0.00)
Tube Current	0.011 (0.00)	0.014 (0.00)	0.003 (0.00)	0.040 (0.00)
Energy Threshold	0.001 (0.21)	−0.110 (0.00)	−0.038 (0.00)	−0.131 (0.00)
Material Concentration	0.692 (0.00)	0.501 (0.00)	0.264 (0.00)	0.759 (0.00)
Image Type	−0.131 (0.00)	0.746 (0.06)	−0.022 (0.37)	2.095 (0.02)

Gadolinium	CNR_lo	CNR_hi	Covar-CNR_lo	Covar-CNRhi
Intercept	−3.531 (0.00)	3.028 (0.38)	2.258 (0.00)	−9.333 (0.10)
Tube Voltage	0.009 (0.00)	0.026 (0.28)	0.011 (0.00)	0.090 (0.03)
Tube Current	0.016 (0.00)	0.047 (0.00)	0.007 (0.00)	0.082 (0.00)
Energy Threshold	0.008 (0.00)	−0.183 (0.00)	−0.066 (0.00)	−0.171 (0.00)
Material Concentration	0.886 (0.00)	0.973 (0.00)	0.399 (0.00)	1.367 (0.00)
Image Type	−0.431 (0.00)	1.886 (0.02)	−0.022 (0.53)	2.537 (0.05)