Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is within normal limits . No CHF , focal infiltrate , effusion , or pneumothorax is detected . Vertical linear lucency seen anterior to the xiphoid on the lateral view most likely represents lung projecting anterior to the sternum , due to normal chest morphology .
    OUTPUT:
    
Chest x-ray examination within normal limits . No pneumonic infiltrate identified .