Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded . Endobronchial valve projects over the left hilum with expected collapse of the left upper lobe . There is persistent herniation of the right lung leftward . Heart size is normal . The mediastinal and hilar contours are normal . Prior left chest tube has been removed . There is no pneumothorax . There is no pleural effusion .
    OUTPUT:
    
No pneumothorax or other acute cardiopulmonary abnormality . COPD .