Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . The cardiomediastinal silhouette , hilar contours , pleural surfaces are normal . Mammillation of the right hemidiaphragm likely eventration as a incidental finding . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Normal radiograph of the chest without findings to explain patient 's cough .