Fig. 4
From: Diagnostic validity of thoracic ultrasound in the assessment of pulmonary embolism
CT pulmonary angiography (a–c) and ultrasound (d) images. a An axial section in the mediastinal window showing a small filling defect seen within the middle lobe lateral segmental branch. b An axial section in the lung window showing subsequent distal pleural-based wedge-shaped opacity. c Coronal section in the mediastinal window showing a filling defect in the middle lobe lateral segmental branch (open red arrow), that is related to the middle lobe pleural-based opacity. d An ultrasound image in B-mode showing a right middle lung zone pleural-based wedge-shaped hypoechoic lesion (yellow arrow)