Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tip of the endotracheal tube lies approximately 7 .1 cm from the carina . The gastric tube extends into the stomach . A right internal jugular central venous catheter tip projects over the distal SVC . Retrocardiac opacity not significantly changed since the prior exam . A layering left pleural effusion is also present . The right lung is clear . There is unchanged right hilar prominence , may reflect an enlarged right pulmonary artery .
    OUTPUT:
    
No significant interval change the retrocardiac opacity and left pleural effusion . Unchanged right hilar prominence .