Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes . Bilateral perihilar opacities are worrisome for mild to moderate pulmonary edema . Superimposed infection not entirely excluded in the appropriate clinical setting . No large pleural effusion or pneumothorax . Cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Bilateral perihilar opacities likely represent mild to moderate pulmonary edema . No displaced fracture identified .