Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable single frontal chest radiograph was obtained . There is persistent moderate diffuse interstitial edema , unchanged from prior study . There is trace left pleural effusion and a small right pleural effusion . Enlargement of the cardiac silhouette is unchanged . There is no pneumothorax .
    OUTPUT:
    
1 . Persistent moderate pulmonary edema . 2 . Unchanged enlargement of cardiac silhouette , consistent with known pericardial effusion . 3 . Bilateral pleural effusions , right greater than left .