X-ray contrast agent

An X-ray contrast agent is a special substance used during imaging tests to improve the visibility of internal organs, blood vessels, or tissues. When injected or ingested, it makes these structures more visible on X-ray or related scans, helping doctors identify abnormalities like blockages, tumors, or infections. The contrast agent works by changing how X-rays pass through the body, creating a clearer, more detailed image. Commonly used agents are iodine-based or barium sulfate, and they are generally safe, though some people may experience minor allergic reactions.