Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . No pneumothorax . No pleural effusion . The azygous vein is slightly enlarged , possibly secondary to a mild volume overload without edema . The heart is at the superior limit of the normal . The TNG tube is in good position .
    OUTPUT:
    
The azygous vein is slightly enlarged possibly secondary to a volume overload without pulmonary edema . The rest is normal .