Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size remains mildly enlarged . The aorta is tortuous and diffusely calcified , but unchanged . Hilar contours are within normal limits . Lungs are clear without focal consolidation . The lungs are hyperinflated , with flattening of the diaphragms . No pleural effusion or pneumothorax is identified . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Probable COPD .