Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal cardiomediastinal silhouette . The lungs are clear . There is no pneumothorax , vascular congestion , or pleural effusion . Multiple healed right posterolateral upper rib fractures are noted . Lateral view is limited by overlying arms .
    OUTPUT:
    
No evidence of pneumonia .