Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy , coronary artery stenting , and CABG . Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vascularity is normal and the lungs are clear . No pleural effusion or pneumothorax is present . Mild degenerative changes are noted in the thoracic spine with mild loss of height of a lower thoracic vertebral body , unchanged .
    OUTPUT:
    
No acute cardiopulmonary abnormality .