Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , there is a new opacity in the right lower lung , concerning for pneumonia . Subtle opacity in the left lower lung may also reflect pneumonia . No evidence of pneumothorax or larger pleural effusions . Cardiomediastinal and hilar silhouettes are grossly unchanged .
    OUTPUT:
    
New opacity in the right lower lung is concerning for pneumonia . Subtle opacity in the left lower lung may also reflect pneumonia .