Venography is a method of collecting images to serve as a basis for examination and diagnosis of diseases. This procedure will be performed by injecting selective iodine contrast agent into arteries or veins, thereby visualizing the venous system.

Blood vessels form a system in the human body and are part of the circulatory system. Blood vessels are tubular, connected to each other to form a closed loop that carries blood from the heart to the organs and vice versa. In addition, blood vessels also have the function of transporting nutrients, oxygen, CO2, and water to organs in the body.