Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . Sternotomy wires are again noted , with fracture of the two upper wires unchanged from prior exam .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .