Gadolinium is a silvery-white, malleable and ductile rare-earth metal. It has exceptionally high absorption of neutrons and therefore is used for shielding in neutron radiography and in nuclear reactors. Because of its paramagnetic properties, solutions of organic gadolinium complexes and gadolinium compounds are the most popular intravenous MRI contrast agents in medical magnetic resonance imaging. This book presents and discusses research on the application of gadolinium-based contrast agents in abdominal MRIs; a review of GBC agents as causes of acute kidney injury and triggers of nephrogenic systemic fibrosis and others.