Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and mitral valve replacement . No focal consolidation is seen . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable , with the cardiac silhouette mildly enlarged . Hilar contours are stable .
    OUTPUT:
    
No acute cardiopulmonary process . No focal consolidation to suggest pneumonia .