Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient status post coronary artery bypass graft . Median sternotomy wires are intact . Numerous surgical clips project over the mediastinum and around the heart . The heart is not enlarged . Mediastinal hilar contours are normal . Calcification and tortuosity of the thoracic aorta is re - demonstrated . There is no pleural effusion or pneumothorax . There is no pulmonary edema . The lungs are hyperexpanded with flattening of the hemidiaphragms as before .
    OUTPUT:
    
1 . Left basilar opacity is resolved . 2 . COPD .