Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternotomy wires appear intact . Again noted is chronic elevation of the left hemidiaphragm with no evidence of a hernia . The lungs are clear . The cardiac and mediastinal silhouettes are stable . No acute fractures are identified .
    OUTPUT:
    
No acute cardiopulmonary process . Chronic elevation of the left hemidiaphragm .