Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is bibasilar atelectasis . There is a moderate hiatal hernia with air - fluid levels seen on the lateral view , which is unchanged in size in comparison to the prior chest radiograph . The lungs are otherwise clear . Heart size is stable . The mediastinal and hilar contours are stable . The pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
1 . Bibasilar atelectasis . 2 . Moderate hiatal hernia , unchanged from prior .