Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior radiograph dated ___ , there has been a significant interval decrease in the size of the right pleural effusion , now small to moderate in volume . There is no left - sided pleural effusion identified . No focal consolidation , pneumothorax , or pulmonary edema is seen . The heart size is normal . Aortic calcifications and mild tortuosity is noted . Mediastinal contours are otherwise stable . Extensive spinal fusion hardware is seen spanning the lower cervical through lower thoracic spine . A small hiatal hernia is noted .
    OUTPUT:
    
Interval improvement of right - sided pleural effusion , now small to moderate in size .