Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are diffuse bilateral parenchymal opacities , suggesting at least mild pulmonary edema . However , as noted on the prior CXR dated ___ , there is a more apparent opacity at the right lung base , which likely represents superimposed pneumonia in the appropriate clinical setting . There is no substantial pleural effusion or pneumothorax . Cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Mild pulmonary edema , with likely superimposed pneumonia in the right lung base .