Cardiothoracic Imaging Guidelines Update

P ulmonary embolism (PE) is a sudden obstruction within a pulmonary artery, usually due to a thrombus migration. In the pediatric population, it is more common than previously thought, 1 and if not recognized and treated, it has a signi fi cant morbidity and mortality. 2 Among the available diagnostic imaging modalities (Table 1), chest x-ray is the least invasive and the most commonly available