Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded clear with flattening of the diaphragms consistent with COPD . The cardiomediastinal silhouette and hilar contours are normal . The pleural surfaces are normal without effusion or pneumothorax .
    OUTPUT:
    
1 . Hyperexpanded lungs and flattening of the diaphragms consistent with COPD . 2 . No evidence of acute cardiopulmonary process .