Digital variance angiography
Digital Variance Angiography
Digital Variance Angiography (DVA) /ˈdɪdʒ.ɪ.təl vɛərɪəns ændʒɪˈɒɡrəfi/ is a medical imaging technique used to visualize the inside, or lumen, of blood vessels and organs of the body, with particular interest in the arteries, veins, and the heart chambers. This is traditionally done by injecting a radio-opaque contrast agent into the blood vessel and imaging using X-ray based techniques such as fluoroscopy.
Etymology
The term "Digital Variance Angiography" is derived from three words. "Digital" /ˈdɪdʒɪtəl/ comes from the Latin digitus, meaning "finger", as fingers are used for discrete counting. It represents the use of digital technology in the process. "Variance" /ˈvɛərɪəns/ is a statistical measurement of the spread between numbers in a data set. In this context, it refers to the variance in the images captured. "Angiography" /ændʒɪˈɒɡrəfi/ is derived from the Greek words angeion meaning "vessel" and graphein meaning "to write or record". It refers to the imaging of blood vessels.
Procedure
The procedure of Digital Variance Angiography involves the injection of a contrast agent into the patient's bloodstream. The contrast agent helps to highlight the blood vessels and organs under the X-ray. The X-ray machine is connected to a computer that digitally processes the images. The variance in these images is then studied to diagnose any abnormalities in the blood vessels or organs.
Related Terms
- Angiogram: An angiogram is an X-ray image of the blood vessels used to evaluate various conditions related to the heart and blood vessels.
- Contrast Agent: A contrast agent is a substance used to increase the contrast of structures or fluids within the body in medical imaging.
- Fluoroscopy: Fluoroscopy is an imaging technique that uses X-rays to obtain real-time moving images of the interior of an object.
- Radiology: Radiology is the medical discipline that uses medical imaging to diagnose and treat diseases within the bodies of animals, including humans.
External links
- Medical encyclopedia article on Digital variance angiography
- Wikipedia's article - Digital variance angiography
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