Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and show an opacity in the lingula . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . No pleural effusion or pneumothorax is present . Clips are noted in the left upper quadrant are unchanged .
    OUTPUT:
    
Lingular opacity could represent pneumonia or atelectasis . These findings were communicated to the ED QA nurses via email at 11 :41 pm on ___ .