Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable supine abdominal chest radiograph was obtained . An endotracheal tube ends at the level of the clavicles . An enteric tube coils in the stomach . The lungs are well inflated and clear . The superior mediastinum is widened . Cardiomegaly is mild to moderate .
    OUTPUT:
    
Widened mediastinum corresponds with known aortic dissection . Endotracheal and orogastric tubes in appropriate location .