Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Subtle basilar opacities are seen , which may be due to atelectasis or aspiration . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Low lung volumes . Subtle basilar opacities , may be due to atelectasis or aspiration . Stable enlargement of the cardiac silhouette .