Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the previous radiograph , there is no relevant change . Extensive right lower lobe opacity , associated with a small - to - moderate pleural effusion , likely caused by an infection . On today 's radiograph , the left upper lung region has also become slightly denser than on the previous image , but without definite signs of infection . No left pleural effusion . Normal appearance of the right lung apex .
    OUTPUT:
    
Stable appearance of right basal pneumonia with associated pleural effusion .