Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The aorta is mildly unfolded and demonstrates diffuse calcification . The pulmonary vascularity is normal . The hilar contours are unremarkable . Lungs are hyperinflated with flattening of the diaphragms and attenuation of the pulmonary vascular markings towards the lung apices , findings compatible with emphysema . No focal consolidation , pleural effusion or pneumothorax is identified . Multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
Emphysema . No acute cardiopulmonary abnormality .