Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is within normal limits . Increased opacification at the left base could represent atelectasis or residual pneumonia . Opacities at the right base likely represent atelectasis . The lungs are otherwise clear . There is no large effusion or pneumothorax .
    OUTPUT:
    
Bandlike opacity at the left base may represent atelectasis or residual pneumonia .