Fig. 2
From: Detector-based spectral CT with a novel dual-layer technology: principles and applications
SDCT images. (a ) Iodine-only image, highlighting tissues containing iodine. (b) Virtual non-contrast image, obtained after removal of pixels containing iodine. (c) Effective atomic number-based image, where the colour depends on the effective atomic number. (d) Virtual monoenergetic images at 40 keV, 60 keV, 80 keV and 100 keV. The contrast signal is highest in the 40-keV image, with the signal progressively decreasing at higher energy levels