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. This definition is taken from the National Library of Medicine's MeSH (Medical Subject Headings) 2026 release, which is the standard vocabulary used to index PubMed and most medical literature.

Yes. Angiography, Digital Subtraction is also referred to as Digital Subtraction Angiography, Subtraction Angiography, Digital in different clinical, research and patient-facing contexts. The MeSH descriptor groups all of these synonyms under a single canonical concept so research and records stay consistent.

Angiography, Digital Subtraction falls under the broader medical category "Analytical, Diagnostic and Therapeutic Techniques and Equipment" in the MeSH hierarchy (tree numbers: E01.370.350.600.350.700.060, E01.370.350.700.060.060, E01.370.350.700.700.060). Browsing the related concepts on this page takes you to neighbouring topics in the same branch of medicine.

For a plain-language explanation of Angiography, Digital Subtraction - including symptoms, treatments and what it means for an Indian patient - ask GoDavaii's Health AI. It works in 22+ Indian languages, is free and needs no signup. Tap "Ask GoDavaii AI about Angiography, Digital Subtraction" above.