Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest PA and lateral radiographs demonstrate stable hyperexpanded lungs with paucity of vasculature in the upper lungs , and flattened diaphragms , consistent severe emphysema . Mediastinal , hilar , and cardiac contours are unremarkable . No pleural effusion or pneumothorax evident . Stable mild anterior wedging of multiple thoracic vertebrae noted .
    OUTPUT:
    
No acute cardiopulmonary process . Severe emphysematous changes .