Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate bilateral perihilar and basilar opacities worrisome for pulmonary edema , superimposed infection not excluded . No large pleural effusion is seen although small pleural effusions are difficult to exclude . There is no pneumothorax . The cardiac silhouette is mildly enlarged . Mediastinal contours are unremarkable .
    OUTPUT:
    
Moderate bilateral perihilar basilar opacities worrisome for pulmonary edema , superimposed infection not excluded