Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest demonstrate hyperinflation of the lungs and flattening of the diaphragms consistent with emphysema , unchanged from the prior study . The lungs show no pleural effusion , focal consolidation or pneumothorax . The cardiac silhouette is normal in size . The mediastinal and hilar contours are within normal limits and unchanged from ___ . The aortic arch is partially calcified and the thoracic aorta is mildly unfolded . The pulmonary vasculature is not engorged .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Emphysema .