Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show hyperinflated and hyperlucent lungs with increased AP diameter of the chest consistent with severe COPD / emphysema . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . No pulmonary vascular congestion or edema is present . The cardiac silhouette is normal in size . The mediastinal and hilar contours are within normal limits with a partially calcified aortic knob . Moderate degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
1 . Findings consistent with severe COPD / emphysema . 2 . No acute cardiopulmonary process .