Figure 1From: Feasibility and accuracy of relative electron density determined by virtual monochromatic CT value subtraction at two different energies using the gemstone spectral imagingRelationship between CT value or energy-subtracted CT value of GSI scan images at (a) 60, (c) 77, (e) 100 and 140 keV and RED. (b) (d) (f) Magnified view of (a), (c), (e), respectively.Back to article page