Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube is 4 .1 cm above the carina . A right internal jugular catheter courses to the level of the mid SVC . Enteric tube overlies the stomach , however , the tip was not imaged . The lung volumes remain low . Diffuse prominence of markings is indeterminate on this supine film . Retrocardiac opacity is unchanged and is presumably atelectasis . No pleural effusion or pneumothorax detected .
    OUTPUT:
    
Endotracheal tube 4 .1 cm above the carina . No pneumothorax detected . Presumed atelectasis , but an underlying infiltrate would be difficult to exclude in this setting .