Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate bilateral pleural effusions , large on the left and moderate on the right . Accounting for differences in positioning from the prior radiograph , these are relatively unchanged . Otherwise , the lungs are essentially clear aside from bibasilar atelectasis . The cardiac contour is obscured by a large left pleural effusion , but the mediastinal contour is normal . No pneumothorax is seen .
    OUTPUT:
    
Unchanged appearance of large left and moderate right pleural effusions with no acute pneumonia identified .