Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has chronic atelectasis in the lung bases as evidenced by chest CT from ___ . A rounded dense opacity in the right lung base corresponds with an area of rounded atelectasis on prior CT . The right - sided pleural effusion has increased in size , now moderate , where as aeration of the left lung base has improved . No definite superimposed consolidation is identified . A right - sided central venous catheter terminates in the expected location of the cavoatrial junction . There is no pneumothorax . The heart size remains moderately enlarged .
    OUTPUT:
    
1 . Stable chronic bibasilar atelectasis with more focal rounded atelectasis in the right lung base . 2 . Increasing right pleural effusion , now moderate . 3 . No definite new superimposed consolidation . 4 . Right central venous catheter terminating at the cavoatrial junction .