Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior chest radiograph on ___ , there is new ill - defined opacity adjacent to the right hilum . There is linear atelectasis in the right upper lung . The left lung is clear . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
New ill - defined opacity adjacent to the right hilum , which may represent early / focal pneumonia in the appropriate clinical setting .