This is a painless ultrasound test performed on the blood vessels in the abdomen and legs, and occasionally the arms, to image the arteries, and to evaluate the blood flow. It can identify areas that have build up of plaque and calcium and blockages that may compromise blood flow. This can cause symptoms of peripheral arterial disease, such as “claudication” – or pain and cramping while walking. This can also assist in planning out an approach for fixing these blockages through angioplasty or stenting that can alleviate symptoms.