Angiography
Angiography refers to the introduction of a contrast agent into a target blood vessel to visualize the target blood vessel, thereby achieving diagnostic purposes. Today's angiography usually refers to digital subtraction angiography, which refers to a technology that uses computer processing to digitize image information to eliminate bone and soft tissue images and make blood vessels clear. Nuldelman obtained the first DSA image in 1977 and has been widely used in clinical applications, replacing the older generation of non-subtraction angiography.
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