What is an Angiography?

Angiography is the x-ray imaging of blood vessels using a contrast agent (dye). The dye makes the blood vessels visible with an x-ray.

Its purpose is to show the blood supply moving to and from an organ. For the kidney, for example, the aorta and renal arteries are studied.

Angiography is helpful to:

  • Learn the location of a narrow or blocked blood vessel
  • Treat a diseased blood vessel
  • Find internal bleeding (to stop the bleeding)
  • Locate and remove a blood clot in a blocked blood vessel
  • Treat certain types of tumors by blocking their blood supply
  • Make a map of your blood vessels before surgery

It is most commonly used to help with treatment, rather than for diagnosis alone.