Radiocontrast agent
Radiocontrast Agent
A Radiocontrast Agent (pronunciation: /ˈreɪdioʊˈkɒntræst ˈeɪdʒənt/) is a type of medical imaging substance used to enhance the visibility of internal structures in X-ray based imaging techniques such as computed tomography (CT) or radiography.
Etymology
The term "Radiocontrast Agent" is derived from the words "radio" referring to radiation, "contrast" indicating the difference in absorption of X-ray photons by different tissues, and "agent" referring to the substance used.
Types of Radiocontrast Agents
Radiocontrast agents can be classified into two main types: Iodinated contrast and Barium sulfate.
- Iodinated contrast agents are water-soluble compounds that contain iodine atoms. These agents are used in intravenous or intra-arterial routes to enhance the contrast in blood vessels and tissues.
- Barium sulfate is an insoluble white powder used primarily for gastrointestinal tract (GIT) studies. It is administered orally or by enema to outline the GIT in X-ray imaging.
Side Effects
Like all medical interventions, the use of radiocontrast agents can have potential side effects. These can range from mild reactions like nausea, vomiting, and rash to severe reactions such as anaphylaxis. Patients with kidney disease or thyroid disease may also have specific risks associated with the use of certain radiocontrast agents.
Related Terms
External links
- Medical encyclopedia article on Radiocontrast agent
- Wikipedia's article - Radiocontrast agent
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