Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable view of the chest was obtained . Subtle perihilar opacities suggest mild vascular engorgement . However , there is subtle patchy opacity over the right upper hemithorax , and underlying infection at this location is not excluded . No large pleural effusion is seen . The cardiac and mediastinal silhouettes are similar with the cardiac silhouette mildly enlarged . No pneumothorax .
    OUTPUT:
    
Subtle patchy lateral right upper lung opacity could be due to infection in the appropriate clinical setting . Perihilar haziness may be due to mild fluid overload .