Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The heart appears normal in size . Patchy calcification is noted along the aortic arch . The mediastinal and hilar contours appear unchanged allowing for differences in technique . In addition to bilateral hilar fullness and upper zone redistribution of the pulmonary vascularity , there is a mild interstitial abnormality suggesting fluid overload or mild vascular congestion . There are no pleural effusions or pneumothorax . Mild degenerative changes are similar along the thoracic spine .
    OUTPUT:
    
Findings suggesting mild vascular congestion .