Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . Subtle worsening opacity at the right base may reflect atelectasis or pneumonia although this is not definitively confirmed on the lateral projection . The cardiomediastinal silhouette , and hilar contours are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Subtle opacity at the right base may reflect atelectasis , however pneumonia is possible in the right clinical context . Oblique views would be helpful in confirming this abnormality .