What does "venography" refer to?

Venography refers to an imaging technique specifically designed to visualize veins using X-ray technology. During this procedure, a contrast dye is injected into the veins, making them visible on X-ray images. This allows healthcare professionals to detect abnormalities such as blood clots, blockages, and other vascular issues. The use of X-ray combined with contrast enhances the clarity of venous structures, making it an effective diagnostic tool for various venous conditions.

The other options pertain to different functions and techniques in vascular assessment. One option describes an ultrasound technique focused on arteries, which is not related to venography. Another option discusses a procedure for measuring blood pressure, which is unrelated to imaging or assessing veins. Lastly, there is a mention of a method for assessing blood flow in arteries, again distinct from the venography technique, which specifically targets veins. Each of these alternatives addresses different aspects of vascular study and diagnostics, underscoring why they do not align with the definition of venography.