Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Mild bibasilar atelectasis is unchanged . Again seen is a large hiatal hernia with air - fluid levels . No focal consolidation . No pleural effusion . The cardiomediastinal and hilar contours are stable . Biapical pleural thickening is unchanged .
    OUTPUT:
    
Mild bibasilar atelectasis , similar to prior study . Unchanged large hiatal hernia .