Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . There are low lung volumes that accentuate the bronchovascular markings . Given this , perihilar opacities may relate to pulmonary edema . In the appropriate clinical setting , underlying infection is not excluded . There are no large pleural effusions or pneumothorax . The cardiac and mediastinal silhouettes are likely accentuated by the low lung volumes and AP technique .
    OUTPUT:
    
Low lung volumes accentuate the bronchovascular markings . Given this , perihilar opacities and prominence of the central pulmonary vasculature is most likely due to pulmonary edema . Underlying infectious process is difficult to exclude in the appropriate clinical setting , consider repeat after any diuresis .