Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior radiograph , the trace right pleural effusion is not enlarging . The left pleural effusion is not perceived . The configuration of the cardiomediastinal contours is unchanged . The lungs are similarly clear aside from bibasilar atelectasis . Severe degenerative changes in the shoulders .
    OUTPUT:
    
No interval change in trace right pleural effusion .