Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The mediastinal and hilar contours appear within normal limits . Patchy but fairly extensive opacity in the right lower lobe is compatible with pneumonia . There are also patchy right middle lobe opacities , fairly streaky , but an additional potential focus of pneumonia . There is no pleural effusion or pneumothorax . Elsewhere the lungs appear clear . The bony structures are unremarkable .
    OUTPUT:
    
Opacities in the right middle and lower lobes , most prominent at the latter site , suggesting pneumonia .