Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable including cardiac enlargement . The lung volumes are low . There is no definite pleural effusion or pneumothorax . The pulmonary vasculature again shows upper zone redistribution , and vascular margins are to some extent indistinct although to a less striking degree than before .
    OUTPUT:
    
Findings suggesting mild vascular congestion .