David A. Bluemke, MD, PhD, Editor of Radiology discusses three research articles from the September 2018 issue of Radiology. ARTICLES DISCUSSED Summary of Gadolinium Distribution in Cerebrospinal Fluid after Administration of a Gadolinium-based MR Contrast Agent in Humans. Radiology 2018; 288(3):703-709. Summary of Immediate Mild Reactions to CT with Iodinated Contrast Media: Strategy of Contrast Media Readministration without Corticosteroids. Radiology 2018; 288(3):710-716. Summary of Contrast-enhanced CT for Colonic Diverticular Bleeding before Colonoscopy: A Prospective Multicenter Study. Radiology 2018; 288(3):755-761.Summary of Classification of CT Pulmonary Opacities as Perifissural Nodules: Reader Variability. Radiology 2018; 288(3):867-875.