Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the most recent prior radiograph , there has been no significant change . There is a retrocardiac opacity and obscuration of the left hemidiaphragm , likely from a combination of atelectasis as well as a small left pleural effusion . There is no right pleural effusion . There is engorgement of the central pulmonary vasculature . The heart size is mildly enlarged . Median sternotomy wires are intact . There is no focal consolidation or pneumothorax . The visualized bony structures show no acute skeletal abnormalities .
    OUTPUT:
    
No signficant interval change . Stable left pleural effusion and lower lobe opaicty , probably atelectasis . Mild pulmonary edema .