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Contrast agent - Revision history
2026-05-13T23:57:18Z
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Prab at 16:51, 22 March 2025
2025-03-22T16:51:44Z
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<p><b>New page</b></p><div>'''Contrast agent''' is a substance used to increase the contrast of structures or fluids within the body in medical imaging. It is often used to improve the visibility of blood vessels and the gastrointestinal tract.<br />
<br />
Several types of contrast agent are in use in medical imaging and they can roughly be classified based on the imaging modalities where they are used. Most contrast agents work by altering the way that [[X-ray]]s or other types of radiation interact with the body.<br />
<br />
==Types of Contrast Agents==<br />
There are several types of contrast agents, including:<br />
<br />
* '''[[Iodinated contrast]]''' - These are used in [[Computed tomography|CT scans]] and [[Radiography|radiographs]] to enhance the visibility of blood vessels and certain types of tissue.<br />
* '''[[Gadolinium]]''' - This is used in [[Magnetic resonance imaging|MRI scans]] to enhance the visibility of blood vessels and certain types of tissue.<br />
* '''[[Barium sulfate]]''' - This is used in [[Radiography|radiographs]] of the digestive system.<br />
* '''[[Microbubble]]s''' - These are used in [[Ultrasound imaging|ultrasound]] to enhance the visibility of blood flow.<br />
<br />
==Uses of Contrast Agents==<br />
Contrast agents are used in a variety of medical imaging procedures, including:<br />
<br />
* '''[[Computed tomography|CT scans]]''' - Iodinated contrast is often used to enhance the visibility of blood vessels and certain types of tissue.<br />
* '''[[Magnetic resonance imaging|MRI scans]]''' - Gadolinium is often used to enhance the visibility of blood vessels and certain types of tissue.<br />
* '''[[Radiography|radiographs]]''' - Iodinated contrast or barium sulfate may be used to enhance the visibility of certain structures.<br />
* '''[[Ultrasound imaging|ultrasound]]''' - Microbubbles are often used to enhance the visibility of blood flow.<br />
<br />
==Risks and Side Effects==<br />
Like any medical procedure, the use of contrast agents carries some risk. These risks can include:<br />
<br />
* '''[[Allergic reaction]]''' - Some people may have an allergic reaction to the contrast agent.<br />
* '''[[Kidney damage]]''' - In rare cases, contrast agents can cause kidney damage, especially in people with pre-existing kidney disease.<br />
* '''[[Nausea]] and [[vomiting]]''' - Some people may feel sick after receiving a contrast agent.<br />
<br />
==See Also==<br />
* [[Medical imaging]]<br />
* [[Radiology]]<br />
* [[Radiography]]<br />
* [[Computed tomography]]<br />
* [[Magnetic resonance imaging]]<br />
* [[Ultrasound imaging]]<br />
<br />
[[Category:Medical imaging]]<br />
[[Category:Radiology]]<br />
[[Category:Contrast agents]]<br />
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