Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A large right pleural effusion is present with compressive atelectasis of the right lung accounting for near complete opacification of the right hemithorax . Mediastinal and left hilar contours appear unremarkable . Heart size can not be assessed given the presence of the large right pleural effusion . Left lung is clear . No pulmonary vascular congestion is present . There are no acute osseous abnormalities . Clips are seen in the right upper quadrant of the abdomen likely reflective of prior cholecystectomy .
    OUTPUT:
    
Large right pleural effusion with associated compressive atelectasis . Clear left lung .