Peripheral Angiography:

 
A Peripheral Angiogram is a test that uses X-rays to help the doctor find narrowed or blocked areas in one or more of the arteries that supply blood to legs. It is an outpatient diagnostic study for patients who may have blocked blood vessels in their legs and lower body. Contrast dye is injected to make arteries (which aren't detectable by X-rays) visible when mixed with blood, doctors can have a "map" of a patient's blood vessels to determine  blockage.