Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Expiratory phase radiograph demonstrates further atelectasis of the right lung with a large right pneumothorax . Right central catheter has a similar appearance and again may not be intravascular . No definite evidence of tension . The left lung remains stable . Heart size and cardiomediastinal contours are stable .
    OUTPUT:
    
Large right pneumothorax . No definite evidence of tension . Right sided central catheter does not appear to be intravascular .