Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac size is top - normal . Patient is status post CABG . The lungs are hyperinflated and clear . There is no pneumothorax or pleural effusion . There are mild degenerative changes in the thoracic spine . Sternal wires are aligned .
    OUTPUT:
    
No acute cardiopulmonary abnormalities or evidence of metastatic disease .