Pulmonary Embolism - Prognosis Pulmonary embolism is diagnosed via a computed tomography pulmonary angiogram which involves the injection of the dye to the blood vessel ahead of the scan is taken. Filters: Placed inside the vena cava to stop clots from achieving the guts in order to avoid unexpected collapse https://sgvasculargrp.com/medical-condition/deep-vein-thrombosis/