Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . Lungs are hyperexpanded and there is flattening of the diaphragms , suggestive of COPD . There is no focal consolidation , pleural effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process . Hyperexpanded lungs and flattening of the diaphragm , suggestive of COPD .