2025 Volume 41 Issue 1 Pages 59-63
There are many types of contrast agents, which have long been indispensable in daily medical practice. Although the use of contrast agents often adds useful information to imaging examinations, their use is associated with certain risks, and the intended use of each contrast agent is determined. To perform examinations safely and obtain the maximum benefit, it is necessary to consider the necessity of using contrast agents and correctly understand contraindications and important precautions for use. Therefore, it is important to regularly update important information on the safety of contrast agents and update related knowledge. In this article, we focus on iodine contrast agents used in CT and gadolinium contrast agents used in MRI, as well as basic matters such as indications for contrast agent use, precautions to take when using contrast agents, and risks such as side effects. We also discuss precautions specific to children and the concept of using contrast agents.