Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size remains mildly enlarged . Mediastinal contours are unremarkable . There is mild upper zone vascular redistribution . Patchy opacities are noted in the bases , which may reflect areas of atelectasis though contusion or infection can not be excluded . No pleural effusion or pneumothorax is identified . No displaced fractures are seen .
    OUTPUT:
    
Mild pulmonary vascular congestion with patchy bibasilar opacities , potentially atelectasis though infection or contusion can not be excluded in the correct clinical setting .