Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Subtle opacity overlying the left lower lobe is most notable on the lateral view . There is no large pleural effusion or pneumothorax identified . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Subtle left lower lobe opacity may be secondary to low lung volumes . If there is no significant clinical suspicion for pneumonia , recommend repeat PA and lateral chest with emphasis on inspiration . If pneumonia is clinically suspected , findings can be considered compatible with pneumonia .