Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . The pulmonary vasculature shows upper zone redistribution and mild fullness suggesting venous hypertension , but without interstitial abnormality . Vessels are perhaps mildly indistinct . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Findings suggesting mild pulmonary venous hypertension without frank congestive heart failure .