Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are moderately well - expanded . There is pulmonary edema of at least moderate severity . Opacity in the left lung base likely represents a layering pleural effusion , possibly with some degree of loculation . Coinciding opacity is probably present and compatible with atelectasis . There is a small to moderate right pleural effusion . There is no pneumothorax . The cardiomediastinal silhouette is stable from prior exam . Aortic arch calcifications are again noted . Results are similar to the examination from earlier on the same day .
    OUTPUT:
    
1 . Opacity in the left lung base likely represents layering pleural effusion , possibly loculated to some extent . Coinciding parenchymal opacity is probably compatible with atelectasis , but can not rule out an underlying infectious process . 2 . Small to moderate right pleural effusion . 3 . Moderate to severe pulmonary edema .