Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . Pulmonary vascularity is normal . Small right pleural effusion persists . Lungs are otherwise clear . No new focal consolidation is identified . There is no pneumothorax . Clips are noted within the right upper quadrant of the abdomen . There are no acute osseous abnormalities .
    OUTPUT:
    
Small right pleural effusion , not significantly changed compared to the prior study .