Digital subtraction angiography of the renal arteries is performed using iodine contrast to visualize the renal vascular system. When the capillaries and parenchyma are enhanced with contrast, the renal morphology as well as the structures of the cortical medulla and renal pelvis are visualized.

Digital subtraction angiography (DSA) captures images of blood vessels using X-rays. This technique can be applied to many different blood vessels in the body, including the renal arteries. So how does the digital subtraction angiography process work?