Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged but unchanged . Mediastinal and hilar contours are unremarkable . Lungs are hyperinflated as seen previously with flattening of the diaphragms , but clear without focal consolidation . No pleural effusion or pneumothorax is visualized . There are mild degenerative changes noted in the mid thoracic spine . .
    OUTPUT:
    
No acute cardiopulmonary abnormality . COPD .