Angiography, Digital Subtraction

Overview

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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Quick facts about Angiography, Digital Subtraction

Topic type

Diagnostic Test

Category

Diagnostics

MeSH classification

E01.370.350.600.350.700.060|E01.370.350.700.060.060|E01.370.350.700.700.060|E01.370.350.760.060|E01.370.370.050.060

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