a computerized x-ray technique in which arteries are visualized following injection of dye into a vein.
Abbreviation: DSA.
digital subtraction angiography in Medicine
digital subtraction angiography digital sub·trac·tion angiography (səb-trāk'shən) n. A computer-assisted x-ray technique that subtracts images of bone and soft tissue to permit viewing of the cardiovascular system.