Angiographie, digitale Subtraktions-

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Angiographie, digitale Subtraktions-

Synonym(e) - Digitale Subtraktionsangiographie - Subtraktionsangiographie, digitale

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.

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MeSH © U.S. National Library of Medicine (NLM)®
MeSH © Deutsches Institut für Medizinische Dokumentation und Information (DIMDI - Deutsche Fassung)
Definition: © HON

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