Fig. 4
From: Detector-based spectral CT with a novel dual-layer technology: principles and applications
Low-contrast dose study. (a) Coronal 120-kVp routine diagnostic CTA image in a patient who received only 20 ml of intravenous contrast, shows poor contrast opacification of the abdominal aorta as well as parenchymal organs. (b) 40 keV VMI at the same level shows significant improvement of vascular contrast in the abdominal aorta. Thus, the low-energy VMI allows the use of low contrast dose, which is valuable in patients with severe renal dysfunction