Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable upright image through the chest was provided . A left - sided single - lead pacemaker is seen with its tip terminating in the right ventricle . Heart size is top normal . There is mild congestion of the central vessels with cephalization and Kerley B lines indicative of interstitial edema . Obscuration of the left costophrenic angle suggests pleural effusion . No focal consolidation is identified convincing for pneumonia . There is no evidence of pneumothorax .
    OUTPUT:
    
Mild pulmonary interstitial edema .