Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and cardiac valve replacement . Cardiac and mediastinal silhouettes are stable . No focal consolidation , large pleural effusion or pneumothorax seen . No overt pulmonary edema is seen . There is persistent mild elevation the right hemidiaphragm .
    OUTPUT:
    
No acute cardiopulmonary process . No focal consolidation to suggest pneumonia .