What is angiography?

Angiography is an interventional detection method, in which contrast agent is injected into blood vessels. Because X-rays can't penetrate the contrast agent, angiography uses this characteristic to diagnose vascular diseases through the images displayed by the contrast agent under X-rays.

Angiography is a photographic technique that introduces contrast agent into the target blood vessels, eliminates the images of bones and soft tissues on angiograms by computer, and only highlights the blood vessels on the angiograms. It is the gold standard for all vascular diseases. We can not only clearly understand the image lesions, but also understand the blood flow and blood vessel wall during angiography, and comprehensively judge the changes of blood vessel structure and function.

The use of contrast agent can make the vascular imaging clearer, and can find tiny lesions covered by other tissues, providing reliable basis for diagnosis and treatment. At present, it is mainly used to display the expansion, deformity, spasm, stenosis, infarction and bleeding of blood vessels, which has been widely used in clinic and recognized by clinicians and patients.

Refer to the above content: Baidu Encyclopedia-Angiography