Final answer:
Angiography is the medical term for X-ray imaging of blood vessels after injection of contrast material. It is a widely used technique to visualize arteries and veins and diagnose conditions associated with blood vessel abnormalities.
Step-by-step explanation:
The medical term for the X-ray imaging of the blood vessels after injection of contrast material is angiography. Angiography is a common medical imaging technique used to visualize the blood vessels in the body, including arteries and veins. It provides detailed information about the structure and function of the blood vessels, helping doctors diagnose and treat conditions like blockages or narrowing.