Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval development of a large right pleural effusion . Right basilar opacification likely reflects compressive atelectasis though infection can not be excluded . Trace left pleural effusion is also present . Patchy left basilar opacity may reflect atelectasis . Heart size is difficult to assess given the presence of a large right pleural effusion . Aorta is mildly unfolded . No pulmonary edema is identified . There is no pneumothorax . No acute osseous abnormalities present .
    OUTPUT:
    
Interval development of large right and trace left bilateral pleural effusions . Bibasilar airspace opacities may reflect atelectasis though infection can not be excluded .