Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Newly placed ET tube terminates at the level of the clavicles , roughly 4 cm above the carina . The patient has had prior median sternotomy with aortic valve replacement . The Swan - Ganz catheter terminates at the level of the main pulmonary artery . Bilateral chest tubes are in place . There is no pneumothorax . The right pleural effusion has slightly decreased , but there is a new small layering left pleural effusion . New retrocardiac airspace opacification is likely due to atelectasis . However , infection or aspiration would be difficult to exclude in the appropriate clinical context .
    OUTPUT:
    
Newly placed ET tube terminates in the mid trachea . New left basilar retrocardiac airspace opacity may be due to atelectasis , infection or aspiration in the appropriate clinical setting . Decreased small right and new small left pleural effusion .