Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Cardiomediastinal silhouette is unremarkable . The pulmonary arteries appear prominent , suggestive of vascular congestion . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
Central pulmonary vascular congestion without frank interstitial edema . No evidence of pneumonia .