Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . A small right pleural scar is unchanged . The cardiac silhouette remains top normal in size , with probable mild retrocardiac atelectasis . The mediastinal contours are normal . The pulmonary vasculature is normal .
    OUTPUT:
    
Top normal heart size , with small right pleural scar and minimal retrocardiac atelectasis .