Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET and NG tubes unchanged in satisfactory position . Retrocardiac opacity continues to slowly improve consistent with resolving pneumonia . Mild cardiomegaly is unchanged and chronic . Mild pulmonary vascular congestion is new since yesterday . The left costophrenic angle is excluded from this study . No right pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Improving retrocardiac opacity consistent with resolving pneumonia . 2 . Mild pulmonary vascular congestion , new since yesterday .