Angiography, Digital Subtraction
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.
Year introduced: 1990
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Tree Number(s): 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
MeSH Unique ID: D015901
Entry Terms:
- Digital Subtraction Angiography
- Subtraction Angiography, Digital
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