In clinical practice, and in accordance with international guidelines, computed tomography pulmonary angiography (CTPA) is currently the gold-standard imaging test for diagnosing acute pulmonary embolism (PE) in patients with suspected PE [1–3]. When properly performed, CTPA enables direct visualization of the pulmonary arteries and any emboli, allowing for an accurate assessment of their location within the pulmonary arterial tree [4–10]. Proximal localization of emboli (in the main or lobar pulmonary arteries) has recently been integrated as a key criterion to identify patients with acute PE who may be candidates for percutaneous reperfusion therapies.
