Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pneumothorax , suggested by the deep sulcus sign on recent chest radiograph , is not convincingly shown on this AP upright projection . Endotracheal tube remains at the level of the clavicular heads . Right sided internal jugular catheter tip terminates in the low SVC . Bibasilar atelectasis and small right effusion are unchanged . Posterior spinal fusion rods are new .
    OUTPUT:
    
No left pneumothorax is convincingly demonstrated .