Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right internal jugular central venous catheter is in stable position in the upper right atrium . Endotracheal tube is approximately 1 .5 cm from the carina . Enteric tube courses into the stomach and beyond the field of view . A temperature probe projects over the mid esophagus . The lungs are normally expanded . Atelectasis at the right base is unchanged . Left basilar opacities are slightly improved . There is no large pleural effusion or pneumothorax . Heart size is normal . The mediastinal and hilar contours are normal .
    OUTPUT:
    
1 . Persistent left retrocardiac opacity which could reflect atelectasis or pneumonia is mildly improved . 2 . ET tube 1 .5 cm from the carina