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