Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates hyperexpanded lungs with interval improvement in bibasilar atelectasis . Cardiomediastinal and hilar contours are unchanged . The nasogastric tube ends in the stomach . No pneumothorax or overt pulmonary edema .
    OUTPUT:
    
Interval improvement in bibasilar atelectasis . No overt pulmonary edema .