Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Postoperative mediastinal widening is unchanged after initial improvement . Small bilateral effusions are unchanged . Bibasilar atelectasis is improved . The right IJ central line terminates in the lower SVC . There is no pneumothorax . Median sternotomy wires are intact .
    OUTPUT:
    
Stable postoperative mediastinal widening . Small bilateral effusions are unchanged . Bibasilar atelectasis is improved .