Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ , interval decrease in lung volumes with increasing bibasilar opacities . These basilar opacities are likely atelectasis , however in the absence of a lateral view underlying infection can not be excluded . No pulmonary edema . No substantial effusions . Heart size is normal . No pneumothorax .
    OUTPUT:
    
Increasing bibasilar opacities are likely atelectasis , however in the absence of a lateral view underlying infection can not be excluded .