Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . Dual - lead left - sided pacemaker is again seen with leads in the expected positions of the right atrium and right ventricle . The patient is status post median sternotomy . The cardiac silhouette remains enlarged . Mediastinal contours are stable . A subtle left base opacity is seen which could be due to atelectasis , although underlying consolidation due to infection or aspiration is not excluded in the appropriate clinical setting . Slight prominence of the central pulmonary vasculature may be due to central pulmonary vascular engorgement . Somewhat curved opacity along the pleura of the right mid hemithorax may be due to loculated pleural effusion or pleural thickening .
    OUTPUT:
    
Opacity along the right mid hemithorax which appears pleural - based may be due to loculated pleural fluid or pleural thickening . There is slight blunting of the right costophrenic angle which may also be due to a trace effusion . Findings could be further evaluated on chest CT . A subtle left base opacity is seen which could be due to atelectasis , although underlying consolidation due to infection or aspiration is not excluded in the appropriate clinical setting .