A duplex ultrasound is often a non-invasive way of detecting and quantifying the narrowing and blockage while in the blood vessels. It can be executed by a educated sonographer and is confirmed by a Radiologist. It is just a pain-free technique done over a couch and typically requires 1-2 hours. https://sgvasculargrp.com/medical-condition/peripheral-arterial-disease/icon-peripheral-arterial-disease-pad-2-3/