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Table 2 Linear regression coefficients of each reconstructed image from the different contrast agent mixtures and of the only individual contrast agent solutions

From: Multicolour imaging with spectral photon-counting CT: a phantom study

Image Mixed gold and gadolinium Mixed iodine and gadolinium Gold only Gadolinium only Iodine only
Gold Gadolinium Iodine Gadolinium Gold Gadolinium Iodine
Slope 0.90 0.81 0.95 0.81 0.97 0.98 1.04
Offset -0.68 0.89 -0.06 0.88 0.04 -0.13 0.22
R2 0.98 0.98 0.99 0.98 0.99 0.98 0.99
RMSE 0.47 0.42 0.13 0.35 0.28 0.35 0.26
95% CI 0.83–1 0.86–1.1 0.96–1 0.77–1 0.9–0.97 0.82–1 0.99–1
  1. RMSE root mean square error, CI confidence interval