Guidelines and Controversies of Computed Tomography and Magnetic Resonance Imaging Contrast Media.

Contrast media is very frequently utilized for computed tomography and magnetic resonance imaging examinations to provide improved tissue contrast and aid in diagnosis. While generally very safe, adverse events can occur following contrast media administration. The main safety concerns for contrast media administration are allergic-like reactions, contrast-induced acute kidney injury for iodinated contrast agents, and nephrogenic systemic fibrosis for gadolinium agents. The American College of Radiology provides guidance on appropriate patient selection and strategies to mitigate the risks of these adverse events.