Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior study , there may have been slight interval improvement in the bilateral alveolar opacities . A right subclavian central line projects over the upper right atrium , slightly more distal than on the prior study . Otherwise , I doubt significant interval change . Again seen is the tracheostomy . An additional line courses over the right neck , right mediastinum , and visualized portion of the right upper abdomen , unchanged -- this apparently represents a VP shunt .
    OUTPUT:
    
Right subclavian line tip projecting over upper right atrium , slightly more distal on the prior study . Clinical correlation requested . Possible slight interval improvement in the bilateral alveolar opacities . Otherwise , I doubt significant interval change .