"imaging agent"的定义和意义

What is an "imaging agent"?

An imaging agent, also known as a contrast agent or contrast medium, is a substance used in medical imaging to improve the visibility of specific areas or structures within the body. These agents are introduced into the body, often through injection or swallowing, to make certain tissues, organs, or blood vessels stand out more clearly on imaging scans like X-rays, MRIs, or CT scans. By improving the contrast between different tissues, imaging agents help doctors get more detailed and accurate images, which can help in diagnosing and evaluating various medical conditions.