Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prominent interstitial markings , clongested pulmonary vasculature are consistent with mild pulmonary edema . There is a mild left pleural effusion and a trace right pleural effusion . A retrocardiac opacity is seen , which may represent atelectasis but can not exclude aspiration or pneumonia in the right clinical setting . Median sternotomy wires and mediastinal clips are again noted .
    OUTPUT:
    
1 . Mild pulmonary edema . 2 . Retrocardiac opacity , which may represent atelectasis but can not exclude aspiration or pneumonia in the right clinical setting . 3 . Small left pleural effusion and trace right pleural effusion .