Fig. 4
From: Dual-layer spectral computed tomography: measuring relative electron density
Computed relative electron densities using Lehmann’s cross-sectional model and calibrated relative electron densities using Saito’s conversion function. a and b Correlation line and percentage error (%Error) between the Lehmann’s cross-sectional model result and the nominal values (n = 18). c and d Corresponding result for Saito’s conversion function result. The diagonal line is drawn in grey in a and c