Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of cardiac silhouette is noted . The aorta remains tortuous and diffusely calcified . The hilar contours are prominent , but this is unchanged . Mild pulmonary vascular engorgement persists , and a small right pleural effusion is likely present . Retrocardiac opacity could reflect atelectasis but aspiration or infection are not excluded . There is no pneumothorax . No acute osseous abnormalities detected .
    OUTPUT:
    
1 . Mild pulmonary vascular congestion and small right pleural effusion . 2 . Retrocardiac opacity could reflect atelectasis but infection and aspiration are not excluded .