Contrast media
Contrast Media
Contrast media (pronunciation: /ˈkɒntrɑːst ˈmiːdiə/) are substances used to enhance the visibility of internal structures in radiographic imaging. They are used to improve the contrast of structures or fluids within the body in medical imaging.
Etymology
The term "contrast media" is derived from the Latin contrā meaning "against" and medium meaning "middle". This refers to the substance's ability to contrast, or stand against, the structures within the body, making them more visible in imaging.
Types of Contrast Media
There are several types of contrast media used in medical imaging, including:
- Iodinated contrast media: These are commonly used in Computed Tomography (CT) scans. They contain iodine, which blocks x-rays.
- Barium sulfate: This is used in X-ray imaging of the digestive system.
- Gadolinium: This is used in Magnetic Resonance Imaging (MRI).
Related Terms
- Radiology: The medical specialty that uses medical imaging to diagnose and treat diseases.
- Radiopaque: Substances that do not allow x-rays or similar radiation to pass through.
- Radiolucent: Substances that allow x-rays or similar radiation to pass through.
Risks and Side Effects
Like any medical procedure, the use of contrast media carries some risks. These can include allergic reactions, kidney problems, and adverse effects on the thyroid. Patients should discuss these risks with their healthcare provider before undergoing procedures that involve contrast media.
External links
- Medical encyclopedia article on Contrast media
- Wikipedia's article - Contrast media
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