Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Background emphysema is unchanged . There is persistent moderate pulmonary interstitial edema . Known consolidation in the superior segment of the left lower lobe is again identified . The cardiac silhouette is unchanged . There is no pleural effusion or pneumothorax . Multiple left - sided rib fractures are again noted .
    OUTPUT:
    
No focal consolidation to suggest acute pneumonia . Moderate interstitial edema .