Final answer:
The process of injecting dye into a blood vessel for lung X-ray imaging is called a pulmonary angiogram, which allows for the visualization of pulmonary vessels.
Step-by-step explanation:
The process of injecting dye into a blood vessel for the purpose of obtaining an X-ray image of the arteries and veins of the lungs is known as a pulmonary angiogram. This diagnostic technique is a type of medical imaging, which uses radiopharmaceuticals that emit gamma rays detectable by imaging equipment to reveal detailed information about the body's internal structures and functions. Specifically, in a pulmonary angiogram, a special dye is injected into the bloodstream, which then travels to the pulmonary vessels, allowing the X-ray to capture detailed images of potential blockages or abnormalities in the pulmonary arteries and veins.