Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs remain relatively hyperinflated . Lateral left base opacity may be due to atelectasis although an early pneumonia is not excluded in the appropriate clinical setting . No pleural effusion or pneumothorax is seen . The cardiac silhouette is mild to moderately enlarged . Mediastinal contours are stable and unremarkable . No pulmonary edema is seen .
    OUTPUT:
    
Mild to moderate enlargement of the cardiac silhouette without pulmonary edema . Subtle posterolateral left base opacity could be due to atelectasis although an early pneumonia is not excluded in the appropriate clinical setting .