Why are contrast agents used in MRI?

Contrast agents are sometimes used during an MRI scan to improve image quality and more clearly distinguish different tissues. This makes it easier to detect tumors, inflammation, vascular changes or other abnormalities that may otherwise be difficult to see.

MRI contrast usually contains the substance gadolinium, which is injected into a blood vessel in the arm. The agent spreads via the bloodstream and makes certain structures, such as blood vessels and tumor tissue, appear more clearly in the images.

Contrast agents are only used when necessary – for example, if changes in the brain, spinal cord, certain organs or blood vessels are suspected. It is generally very safe, but patients with severely impaired kidney function may need to be assessed specifically before use.