Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A large right pleural effusion is new from the prior study . Superimposed opacity likely represents compressive atelectasis , however infectious process could be considered the proper clinical setting . There is no left pleural effusion . There is mild pulmonary vascular congestion without overt pulmonary edema .
    OUTPUT:
    
1 . New large right pleural effusion . 2 . Superimposed opacity may represent compressive atelectasis or infectious process in the proper clinical setting . 3 . Mild pulmonary vascular congestion without overt pulmonary edema .