Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild - to - moderately enlarged . The aorta shows calcifications along the arch . The mediastinal and hilar contours appear similar . There is increased indistinctness of vascularity and slightly prominent interstitial opacities suggesting mild vascular congestion . In addition , there is a possible small left - sided pleural effusion based on blunting of the left costophrenic sulcus on the frontal view . A patchy new medial left retrocardiac opacity in the left lower lobe which may reflect pneumonia or potentially atelectasis . Moderate - to - severe thoracolumbar compression deformity appears unchanged .
    OUTPUT:
    
1 . Findings suggesting mild pulmonary vascular congestion . 2 . Patchy retrocardiac opacity for which atelectasis could be considered as the etiology , but pneumonia is not excluded . 3 . Possible small left pleural effusion .