Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal is seen 8 .4 cm above the level of the carina . A right - sided central venous catheter terminates in the upper SVC and is unchanged . Left - sided pigtail catheter and chest tube are in unchanged positions . The cardiomediastinal and hilar contours are within normal limits and stable from the prior examination . There are persistent bibasilar opacities , with subtly increased opacity on the right compared to the prior exam . There is no appreciable pneumothorax . Subcutaneous emphysema on the left is unchanged .
    OUTPUT:
    
1 . No evidence of pneumothorax . 2 . Endotracheal tube is 8 .4 cm above the carina . 3 . Persistent bibasilar opacities , most likely represent atelectasis however infection can not be excluded .