Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube is seen terminating approximately 6 cm above the level of the carina , placed in the interval . The patient is status post median sternotomy . Extensive bilateral pulmonary opacities appear slightly improved compared to the prior study with slight improvement in aeration of the lungs . Obscuration of the right hemidiaphragm is seen which could be due to underlying atelectasis and pleural effusion . Cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Extensive bilateral pulmonary opacities again seen with slight improvement and improved aeration of the lungs as compared to the prior study . Interval placement of endotracheal tube terminating approximately 6 cm above the level of the carina .