Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are normal . Lungs are clear . Incidental note is made of a azygos fissure . There is no pleural effusion or pneumothorax . No acute bony abnormality is identified .
    OUTPUT:
    
Normal chest radiograph ; specifically , no evidence of rib fracture or pneumothorax .