Contrast medium
Contrast medium is a substance used in medical imaging to enhance the contrast of structures or fluids within the body. This helps to improve the visibility of specific organs, blood vessels, or tissues. Contrast media are commonly used in radiography and radiology.
Types of Contrast Medium[edit | edit source]
There are several types of contrast media used in medical imaging. These include:
- Iodinated contrast - This is a type of contrast medium used in X-ray and CT scan imaging. It contains iodine, which blocks X-rays and appears white on the images.
- Barium sulfate - This is a type of contrast medium used in X-ray imaging of the digestive system. It is usually swallowed or administered as an enema.
- Gadolinium - This is a type of contrast medium used in MRI imaging. It enhances the quality of the MRI images.
Uses of Contrast Medium[edit | edit source]
Contrast media are used in various types of medical imaging to improve the visibility of specific organs, blood vessels, or tissues. Some of the common uses include:
- Angiography - This is a type of X-ray imaging used to visualize the inside of blood vessels and organs of the body, particularly the arteries, veins, and the heart chambers.
- CT scan - This is a type of imaging that uses X-rays and a computer to create detailed images of the body. Contrast medium is often used to improve the visibility of specific areas.
- MRI - This is a type of imaging that uses a magnetic field and radio waves to create detailed images of the body. Contrast medium is often used to enhance the quality of the images.
Risks and Side Effects[edit | edit source]
While contrast media are generally safe, they can cause side effects and complications in some people. These may include:
- Allergic reaction - Some people may have an allergic reaction to the contrast medium. This can range from mild symptoms such as itching and rash to severe reactions such as difficulty breathing and low blood pressure.
- Kidney damage - In rare cases, contrast media can cause kidney damage, especially in people with pre-existing kidney disease.
- Nausea and vomiting - Some people may experience nausea and vomiting after receiving contrast medium.
See Also[edit | edit source]
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