Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . No confluent opacity is identified to suggest pneumonia . There is mild prominence of the central pulmonary vasculature , though no overt interstitial edema . No pleural effusion is evident . Cardiomediastinal and hilar contours are within normal limits . No pneumothorax is evident .
    OUTPUT:
    
Mild central pulmonary vascular congestion without overt interstitial edema .