Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube ends 3 .3 cm above the carina . Right internal jugular Swan - Ganz catheter , mediastinal drains and left chest tube unchanged . Lung volumes are slightly improved compared to yesterday with improved aeration of the left lung . Expected postoperative appearance of the mediastinum with median sternotomy wires and surgical clips in unchanged position . No pneumothorax .
    OUTPUT:
    
1 . Interval improvement in lung volumes with better aeration of the left lung . 2 . ET tube ends 3 .3 cm above the carina .