Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Slight elevation of the right hemidiaphragm is again noted . There is subtle opacity obscuring the right posterior lung base on the lateral view which could reflect an early pneumonia . Otherwise , the lungs appear clear . No pleural effusion or pneumothorax . Cardiomediastinal silhouette appears normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Subtle opacity in the right lower lobe may represent an early pneumonia .