Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low which accentuates the size of the cardiac silhouette . Heart size is mildly enlarged . Aorta is unfolded . Hilar contours are unremarkable . Bronchovascular crowding is demonstrated without overt pulmonary edema . Patchy opacities in lung bases likely reflect areas of atelectasis . No pleural effusion or pneumothorax is present . No acute osseous abnormality is identified .
    OUTPUT:
    
Low lung volumes with patchy bibasilar airspace opacities , likely atelectasis though infection is not completely excluded .