Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A large right pleural effusion has increased in size compared to the prior chest radiograph , but appears similar compared to the prior CT . Associated right basilar opacity likely reflects compressive atelectasis . A small left pleural effusion is likely present . Patchy left basilar opacity may reflect atelectasis . Heart size is difficult to assess given the presence of the large right pleural effusion . There is mild pulmonary vascular engorgement . Mediastinal contours are grossly unchanged . There is no pneumothorax . No acute osseous abnormality is visualized .
    OUTPUT:
    
1 . Persistent large right pleural effusion , increased from the prior chest radiograph , but similar to the prior chest CT . Probable small left pleural effusion . 2 . Bibasilar atelectasis . 3 . Mild pulmonary vascular engorgement .