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 at the right lung base , seen best on the frontal projection , which could represent a very early pneumonia . This finding appears new from the prior exam . Elsewhere , lungs appear clear . No effusion or pneumothorax . Cardiomediastinal silhouette is normal .
    OUTPUT:
    
Subtle opacity at the right lung base could represent pneumonia in the correct clinical setting .