A duplex ultrasound is actually a non-invasive way of detecting and quantifying the narrowing and blockage during the blood vessels. It can be executed by a properly trained sonographer and is confirmed by a Radiologist. It's a painless treatment carried out over a couch and frequently can take one-2 hours. https://sgvasculargrp.com/medical-condition/peripheral-arterial-disease/icon-peripheral-arterial-disease-pad-2-3/