Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are subtle bilateral Kerley B lines , suggesting very minimal intersitial edema . These are new from the prior radiograph . There is no consolidation , pleural effusion or pneumothorax . The cardiac silhouette is mildly enlarged and unchanged from prior radiographs . The mediastinal contours are normal .
    OUTPUT:
    
1 . Mild interstitial pulmonary edema . 2 . Stable mild cardiomegaly .