Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hyperexpanded with flattening of the hemidiaphragms , widening of the anteroposterior diameter . There is minimal right lower lobe atelectasis , no focal consolidation , but overall aeration has improved . Median sternotomy wires are seen from prior coronary artery bypass grafting , with chronic fracture of the superior most wire . Cardiomediastinal and hilar contours are normal . There are no pleural effusions , pneumothorax , or pneumomediastinum . There is no free air under the diaphragm .
    OUTPUT:
    
1 . Chronic obstructive airways disease . 2 . No acute cardiopulmonary process .