Evaluation of the air bronchogram
sign on CT in solitary pulmonary lesions.
A CT scan revealed consolidation with extensive air bronchograms
primarily in the anterior segment of the right upper lobe (Fig.
of cases Imaging findings Lung disease 14 Opacification 4 Pneumonia/bronchopneumonia 4 Pulmonary pathology 2 Infiltrates 2 Air bronchograms
1 Lower respiratory tract infection 1 Pleural effusion Other 4 Distended bowel 1 Enlarged liver
The mass tends to be flat or ovoid (rather than rounded) and may contain air bronchograms
or may cavitate.
Increasing density results in loss of cardiac and diaphragmatic margins first, then air bronchograms
developing and then filling in of these resulting in 'white out' (Fig.
A chest radiograph showed increased shadowing (Figure 1, panel B) and a computed tomographic (CT) scan of the chest showed a 6x3-cm solid mass in the upper left chest with visible air bronchograms
and minor volume loss, reported as "almost certainly solid neoplasm" (Figure 2).
In lobar atelectasis, the presence or absence of air bronchograms is useful to determine the potential effectiveness of therapeutic bronchoscopy.
Air bronchograms are characteristic (89%) (12) and help distinguish ARDS from hydrostatic edema (Figure 4).
A chest radiograph showed increased markings in the right lower lobe medially with associated peribronchial thickening and some faint air bronchograms
consistent with an early bronchial pneumonia.