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angiography (an″je-og´rә-fe)   radiography of vessels of the body after injection of contrast material; see also arteriography, lymphangiography, and phlebography. Called also vasography.
 

digital subtraction angiography  radiographic visualization of blood vessels, with images produced by subtracting background structures and enhancing the contrast of those areas that change in density between a preliminary “mask” image and subsequent images. Intra-arterial digital subtraction angiography is a type of arteriography that uses electronic circuitry to subtract the background of bone and soft tissue to provide a useful image of the arteries injected with contrast medium. Intravenous digital subtraction angiography is a type of phlebography provides a similar image of the veins.





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