Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . There is no pleural effusion or pneumothorax . The mediastinum is less wide than on prior radiographs of the time of discharge , consistent with decreasing postsurgical mediastinal hematoma . Median sternotomy wires are noted .
    OUTPUT:
    
No acute cardiopulmonary process . Interval decrease in mediastinum width , consistent with decreasing postsurgical mediastinal hematoma .