Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior radiograph , there has been significant improvement in the right - sided pleural effusion , the fluid currently seen along the lateral pleural surface of the right lung , in the region of the pleural catheter . Right lung volume has reduced since the prior study with lower position of the fissure , indicative of right middle and lower lobe atelectasis . The left lung is clear . Heart size is top - normal . No pneumothorax .
    OUTPUT:
    
1 . Significant interval improvement in right - sided pleural effusion . 2 . Partial collapse of the right middle and lower lobes .