Fig. 7From: Diagnostic validity of thoracic ultrasound in the assessment of pulmonary embolismCT pulmonary angiography (a–c) and ultrasound (d) images. a, b Axial and coronal sections in the mediastinal window showing normal appearance of the main, segmental, and the sub-segmental arteries with no evidence of any filling defects. c An axial section showing a left basal pleural-based subsegmental atelectasis (red arrow). d An ultrasound image in B-mode showing a left lower lung zone well-defined pleural-based rounded hypoechoic lesion (between the calibers)Back to article page