Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery as well as posterior fusion along the thoracolumbar spine involving two separate segments , as before . The patient is also status post incompletely characterized lower anterior cervical fusion surgery . The lungs appear clear . There is no pleural effusion or pneumothorax . The cardiac , mediastinal and hilar contours appear stable .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .