digital subtraction angiography

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digital subtraction angiography

[′dij·əd·əl səb′trak·shən ‚an·jē′äg·rə·fē]
(medicine)
A form of digital radiography that delineates blood vessels by subtracting a digitized tissue background image from an image of tissue injected with an intravascular contrast material with a high content of iodine that attenuates x-rays. Abbreviated DSA.
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