Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy . The lungs are clear without focal consolidation . There are relatively low lung volumes . No pleural effusion or pneumothorax is seen . The cardiac silhouette is top - normal to mildly enlarged . No pulmonary edema is seen .
    OUTPUT:
    
No acute cardiopulmonary process .