Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The hilar and mediastinal contours are within normal limits . There is mild central pulmonary vascular congestion with minimal interstitial edema . No large effusion , consolidation , or pneumothorax is seen . VP shunt coarses over the right hemithorax .
    OUTPUT:
    
Mild pulmonary vascular congestion .