Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The ETT terminates 4 cm above the carina . Sternotomy wires are intact and appropriately aligned . The patient is status post aortic valve replacement and mitral valve clipping . There is a NG tube , which courses below the diaphragm , although the tip is not visualized on these images . Heart size is stable . The mediastinal and hilar contours are stable . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Appropriate positioning of the ETT and NG tube .