Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded , causing flattening of the hemidiaphragms and enlargement of the retrosternal clear space , not significantly changed compared to most recent study from ___ . There is no focal consolidation . The heart is normal in size . Mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen . There is evidence of prior CABG , including an intact single midline sternotomy wire .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . Hyperexpanded lungs , in keeping with known obstructive airways disease .