Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is probable background hyperinflation . Allowing for this , on the frontal view , inspiratory volumes are low . There is mild to moderate cardiomegaly , similar to the prior study . There is bibasilar subsegmental atelectasis . There is also atelectasis in the right middle lobe , slightly more pronounced than on ___ . No definite pneumonic infiltrate . No frank consolidation . No effusion identified . There is upper zone redistribution , with mild vascular plethora , more pronounced than in ___ .
    OUTPUT:
    
1 . Bibasilar atelectasis and atelectasis in the right middle lobe . No frank consolidation . However , the possibility of an early infectious infiltrate in the right middle lobe can not be entirely excluded . 2 . Mild to moderate cardiomegaly , unchanged . 3 . Mild vascular plethora , more pronounced than on ___ .