Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable radiograph of the chest demonstrates a left tension pneumothorax with shift of the mediastinal structures to the right . An endotracheal tube terminates in the right mainstem bronchus . A nasogastric tube is also seen , with sidehole port above the GE junction . The heart size is normal . No pleural effusion is noted .
    OUTPUT:
    
Tension pneumothorax with rightward shift of the mediastinum . Endotracheal tube terminates in the right mainstem bronchus .