Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low , vertically on the left were there is left lower lobe atelectasis as seen on the prior CT . Similar appearance of the right lung base . No new areas of consolidation seen . No definite pleural effusion seen . No pneumothorax seen .
    OUTPUT:
    
Persistent bibasilar atelectasis , infection can not be excluded . Appearances are grossly similar when compared to the prior CT abdomen .