Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A large right hydropneumothorax is demonstrated with atelectasis of the right lung and mild leftward shift of midline structures . The amount of fluid within the right pleural space appears small . Heart size is not enlarged . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Left lung appears hyperinflated . There are no acute osseous abnormalities .
    OUTPUT:
    
Large right hydropneumothorax with atelectasis of the right lung and mild leftward shift of mediastinal structures concerning for tension . Dr . ___ was aware of these findings at 13 : 20 , ___ .