Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild cardiomegaly . The mediastinal contour is unremarkable . Left perihilar and bibasilar alveolar opacities are noted , concerning for moderate asymmetric pulmonary edema , but pneumonia is not excluded . No large pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Left perihilar and bibasilar alveolar opacities are concerning for moderate asymmetric pulmonary edema but pneumonia is not excluded . Follow up radiographs after diuresis are recommended .