Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The patient is status post coronary artery bypass graft surgery . Sternotomy wires are intact . Cholecystectomy clips in the right upper quadrant are in stable position . Heart size and cardiomediastinal contours are stable . There is right lung hyperexpansion , similar to prior and suggestive of COPD . The lungs are otherwise clear with persistent elevation of the left hemidiaphragm . No focal consolidation or pneumothorax .
    OUTPUT:
    
1 . No evidence of acute cardiopulmonary process . 2 . COPD and persistent elevation of the left hemidiaphragm , similar to prior .