Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart size is top normal , unchanged . Mediastinal and hilar contours are unchanged , and there is no pulmonary vascular congestion . Linear scarring in the left lung base is re - demonstrated as is scarring within the lung apices . No focal consolidation , pleural effusion or pneumothorax is seen . There are multilevel degenerative changes in the thoracic spine , but no acute abnormalities are seen within the osseous structures .
    OUTPUT:
    
No acute cardiopulmonary abnormality .