Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube is in satisfactory position 4 .6 cm from the carina . An enteric tube courses below the diaphragm with the tip out of field of view . A left - sided PICC is present with the tip in the mid SVC . There is a retrocardiac opacity with associated volume loss . This is likely due to left lower lobe atelectasis . There is likely a small associated pleural effusion . The remainder of the lungs are clear . There is no pulmonary edema . There is no right pleural effusion . There is no pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Retrocardiac opacity is likely a combination of left lower lobe collapse and a small amount of pleural fluid .