Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There is subtle opacity seen over the right lower lung , which could represent a very early right lower lobe pneumonia . Otherwise , the lungs are clear . No large effusion or pneumothorax . Cardiomediastinal silhouette is stable with an unfolded thoracic aorta again noted . The bony structures are intact .
    OUTPUT:
    
Subtle opacity at the right lung base could represent an early right lower lobe pneumonia .