Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is top - normal in size but stable from the prior examination . Lung volumes are markedly low which accentuates bronchovascular markings . Subtle bibasilar opacities most likely reflect atelectasis . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Low lung volumes . Subtle bibasilar opacities most likely reflect atelectasis however infection should be considered in the appropriate setting .