Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . The lung volumes remain low . There are persistent patchy opacities in the lower lungs , but somewhat better aerated and expanded , suggesting partial resolution of what is probably , at least predominantly , atelectasis . Background prominence of pulmonary vascularity with indistinct vessels suggests fluid overload . A curvilinear shadow continues to project over the right upper lung . Lung markings are clearly seen beyond it , but it is difficult to entirely exclude the possibility of a pneumothorax involving partial retraction of the right upper lobe , although doubted . There is no free air .
    OUTPUT:
    
Partial improvement in right basilar opacities . Persistent findings suggesting fluid overload . Persistent shadow projecting over the right upper thorax , which raises concern for the possibility of an unusual imaging appearance of pneumothorax ; although doubted , chest CT are short - term followup radiograph should be considered to exclude the diagnosis , in addition to correlation with whether there has been any recent prior history of instrumentation .