Iotrolan is a contrast agent.

Ioversol is a non-ionic compound with a tri-iodinated benzene ring used as a contrast dye in diagnostic procedures to visualize different types of organs and tissues. Iodine has a high atomic density, which gives it the ability to attenuate X-rays. The intravascular administration of iodine compounds, such as ioversol, enhances the contrast between vessels in the path of the flow of the contrast medium and normal tissue, allowing the visualization of internal structures.