Digital subtraction angiography
Digital Subtraction Angiography
Digital Subtraction Angiography (Dih-ji-tuhl Sub-trak-shuhn An-gee-og-ruh-fee) is a type of angiography that uses digital technology to subtract the initial image from the image of the blood vessels filled with contrast material. This technique is primarily used to visualize arteries and veins in the body.
Etymology
The term "Digital Subtraction Angiography" is derived from the following words:
- Digital: From Latin digitus meaning "finger", as fingers are used for discrete counting. It refers to the digital technology used in the process.
- Subtraction: From Latin subtractionem meaning "taking away". It refers to the subtraction of initial image from the image of the blood vessels filled with contrast material.
- Angiography: From Greek angeion meaning "vessel" and graphia meaning "writing". It refers to the imaging of blood vessels.
Procedure
Digital Subtraction Angiography involves the injection of a contrast material into the blood vessels. The initial image is then subtracted from the image of the blood vessels filled with contrast material, resulting in a clear image of the blood vessels without the surrounding body tissues.
Related Terms
- Angiography: The medical imaging technique used to visualize the inside of blood vessels.
- Contrast material: A substance used in radiography to increase the contrast of an image.
- Radiography: The use of X-rays or other forms of radiation to view objects.
See Also
External links
- Medical encyclopedia article on Digital subtraction angiography
- Wikipedia's article - Digital subtraction angiography
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