The digital subtraction angiography of the visceral venous system is a method of angiography with iodine contrast injection and processed through a high-tech system to clarify the image of lesions of the visceral venous system in the body.

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.