Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Subtle opacity is seen projecting over the right lung base which could represent a very early pneumonia in the right lower lobe . Otherwise , lungs are clear . No effusion or pneumothorax . Heart size is top - normal . Mediastinal contour is normal . Fusion hardware in the lower cervical spine is noted . Bony structures appear intact . No free air is seen below the right hemidiaphragm .
    OUTPUT:
    
Subtle right lower lung opacity could represent an early pneumonia in the right lower lobe . Top - normal heart size .