Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , there has been no significant change . Again noted is a small right sided pleural effusion . There is atelectasis of the right lower lobe . The cardiac and mediastinal contours are unchanged . There is no pneumothorax . Retrocardiac opacity could represent a hiatal hernia . Vertebroplasty is present in the lower T - spine .
    OUTPUT:
    
Small right sided pleural effusion .