Pulmonary Embolism - Diagnosis Pulmonary embolism is diagnosed by using a computed tomography pulmonary angiogram which will involve the injection of a dye into your blood vessel before the scan is taken. Deep Vein Thrombosis - Prognosis ​DVT is diagnosed through an ultrasound scan in the veins in the legs. https://sgvasculargrp.com/medical-condition/deep-vein-thrombosis/