Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and show a subtle opacity in the superior segment of the right lower lobe . The cardiomediastinal silhouette and hilar contours are normal . No pleural effusion or pneumothorax is present .
    OUTPUT:
    
An opacity in the superior segment of the right lower lobe is most consistent with pneumonia . Follow - up radiographs after adequate treatment are recommended to document resolution .