Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unchanged and within normal limits . Right middle lobe collapse appears worse when compared to the prior chest radiograph when there was partial collapse , but appears similar compared to the prior chest CT . The pulmonary vascularity is not engorged . The left lung is clear . No pleural effusion or pneumothorax is detected . Old bilateral rib fractures are again noted . Emphysematous changes are again seen .
    OUTPUT:
    
Recurrent right middle lobe collapse . Correlation with bronchoscopy or contrast - enhanced chest CT is again recommended for further assessment .