Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is noted . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Patchy opacities are demonstrated in the lung bases , likely reflective of atelectasis . No pleural effusion , focal consolidation or pneumothorax is demonstrated . No acute osseous abnormality is visualized .
    OUTPUT:
    
Patchy bibasilar opacities , likely atelectasis . Infection is not excluded in the correct clinical setting .