Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates prominent cardiac silhouette . The mediastinal and hilar contours are within normal limits . There may be mildly increased perihilar vascular markings as compared to ___ , but this is confounded by under penetration . There is no pneumothorax or large effusion . There is no confluent consolidation to suggest pneumonia .
    OUTPUT:
    
No definite evidence of pneumonia . Can not exclude mild vascular congestion .