Analytical, Diagnostic and Therapeutic Techniques, and Equipment

Digital Subtraction Angiography

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.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

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.

MeSH Record

Classification

Broader headings

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MeSH Record

Synonyms

2 entry terms
  • Angiography, Digital Subtraction
  • Subtraction Angiography, Digital

MeSH Record

Aspects Covered

16 allowable subheadings

Indexed with the subheadings adverse effects, classification, drug effects, economics, ethics, history, instrumentation, methods, mortality, nursing, psychology, radiation effects, standards, statistics & numerical data, trends, veterinary.

MeSH Record

History Note

90

MeSH Record

Previous Indexing

  • Angiography (1980-1989)
  • Subtraction Technique (1980-1989)

MeSH Hierarchy

Tree Numbers

  1. E01w.370.350w.600w.350.700.060w
  2. E01w.370.350w.700w.060w.060w
  3. E01w.370.350w.700w.700.060w
  4. E01w.370.350w.760w.060w
  5. E01w.370.370w.050w.060w

MeSH Record

NLM Classification

WG 141.5.A3

AMA Style

References

  1. National Library of Medicine. Digital Subtraction Angiography. Medical Subject Headings (MeSH). 2026. Unique ID D015901. http://id.nlm.nih.gov/mesh/2026/D015901
  2. Digital Subtraction Angiography. In: Wikipedia. https://en.wikipedia.org/wiki/Digital_subtraction_angiography
  3. Digital Subtraction Angiography. In: Wikidata. https://www.wikidata.org/wiki/Q1224954