Angiography, Digital Subtraction

A C D E F G H I L M N O P R S T V

Angiography, Digital Subtraction

Synonym(s) - Digital Subtraction Angiography - Subtraction Angiography, Digital

Definition: A method of delineating blood vessels by subtracting a tissue background image from an image of tissue plus intravascular contrast material that attenuates the X-ray photons. The background image is determined from a digitized image taken a few moments before injection of the contrast material. The resulting angiogram is a high-contrast image of the vessel. This subtraction technique allows extraction of a high-intensity signal from the superimposed background information. The image is thus the result of the differential absorption of X-rays by different tissues.

Broader term(s)

 

MeSH © U.S. National Library of Medicine®.

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