Fig. 5
From: Efficient spectral data reduction for accurate iodine quantification in multi-energy CT
Comparison of two-channel CRLB weighted schemes relative to the four-channel estimator iodine noise for each duty cycle for the 300 mm patient size. As the 140 kVp component of the duty cycle increases, the noise estimates for kVp-S noise and maximally separated weighting become larger. In comparison, the optimal weighting scheme, particularly scheme 1, remains robust and capable of achieving noise levels within 0.26% of the four-channel estimate, given by proximity to the red bar, regardless of duty cycle.
