Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The mediastinal and hilar contours appear unchanged . Each hilum shows an engorged appearance with upper zone redistribution of pulmonary vascularity and a central interstitial abnormality , worse than on the prior study and suggestive of mild - to - moderate vascular congestion . The lateral view shows a small pleural effusion on the right and also patchy posterior opacification in the left lower lobe , probably due to a combination of parenchymal opacity and pleural effusion . This appearance is accompanied by increased volume loss with new elevation of the left hemidiaphragm , which may imply atelectasis . The bones appear demineralized . Mild - to - moderate degenerative changes are similar along the thoracic spine .
    OUTPUT:
    
1 . Findings consistent with mild - to - moderate pulmonary vascular congestion . 2 . Small suspected bilateral pleural effusions and patchy dependent opacity in the left lower lobe with volume loss . Although pneumonia is hard to completely exclude , this appearance could likely be explained by atelectasis .