Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly lower compared to the prior exam . Slightly asymmetric increased opacity in the right infrahilar region could reflect bronchovascular crowding and atelectasis but an early bronchopneumonia can not be excluded , particularly in the setting of prior CT showing an opacity in the right lower lobe . No effusion , edema , or pneumothorax . The heart is normal in size . The mediastinum is not widened . Aortic knob calcifications are unchanged . No acute osseous abnormality .
    OUTPUT:
    
Possible early bronchopneumonia in the right lower lung . Subtle opacity in right perihilar region , which may correspond to a superior segment right lower lobe abnormality detected on CT of ___ , at which time the three - month followup CT was recommended .