Digital subtraction angiography for noninvasive imaging of the renal artery.

Digital subtraction angiography (DSA) is a relatively new radiologic technique for noninvasive imaging of arterial anatomy. DSA has been shown to be effective in defining the renal arteries in patients with known or suspected renovascular disease. DSA is an excellent means of screening for renovascular disease and of following patients with serial studies after surgical revascularization or percutaneous dilatation of renal arterial stenosis. It is excellent for monitoring patients with known renovascular disease.