Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right chest tube is in unchanged position . There is persistent opacity within the right lung base , which is similar in severity compared to recent prior , likely a combination of post-surgical atelectasis and pleural fluid . Overall aeration of the right lung is unchanged . The left lung remains essentially clear . Post - surgical changes within the left base are noted . There is decreased pulmonary vascular congestion as compared to most recent prior . Cardiomediastinal and hilar contours are within normal limits . No pneumothorax is identified .
    OUTPUT:
    
Persistent right lower lobe opacity related to recent thoracotomy and pleural mass resections . Overall unchanged aeration of the lungs . Slightly decreased edema .