Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The lung volumes are low . The superior vena cava appears distended and there is mild bilateral hilar congestion , all suggesting mild fluid overload . However , the lungs appear otherwise clear . There is no pleural effusion or pneumothorax . The bony structures are unremarkable .
    OUTPUT:
    
Findings suggest mild fluid overload .