Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The visualized lung fields are clear without any pleural effusions or pneumothorax . The cardiac and mediastinal silhouette is unremarkable . A nasogastric tube passes below the level of the diaphragm and stomach , and a right subclavian central venous catheter terminates in appropriate position at the cavoatrial junction .
    OUTPUT:
    
No pleural effusions .