Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG with coronary artery stents noted . Biapical scarring and emphysematous changes are again noted . Otherwise the lungs are clear . There is no focal consolidation concerning for pneumonia nor effusion . There is no free air . The cardiac size is within normal limits .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .