Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a prominent air - filled have a circular opacity corresponding to a hiatal hernia best seen on CT dated ___ . There is relatively low lung volumes with basilar atelectasis . No other parenchymal consolidation is seen . No pneumothorax or definite pleural effusion is seen .
    OUTPUT:
    
Low lung volumes with basilar atelectasis .