Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is complete opacification of the right hemithorax with leftward shift of mediastinal structures indicative of a large right pleural effusion . Left lung is grossly clear without focal consolidation , left pleural effusion or pneumothorax . Heart size is appears unchanged . Pulmonary vasculature is not engorged . Left hilar contour is unremarkable . There are no acute osseous abnormalities .
    OUTPUT:
    
Complete opacification of the right hemithorax compatible with large right pleural effusion with leftward shift the mediastinal structures .