Fig. 6
From: Diagnostic validity of thoracic ultrasound in the assessment of pulmonary embolism
CT pulmonary angiography (a, b) and ultrasound (c) images. a An axial section in the mediastinal window showing a hypodense filling defect seen involving the distal most part of the right main pulmonary artery extending into its descending branch (red arrow). b An axial section in the mediastinal window showing multiple hypodense filling defects that are seen involving the pulmonary arteries’ descending branches (red arrows). c An ultrasound image in B-mode showing no evidence of pleural-based lesions