Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Acute rib fractures involve the right eighth and ninth lateral arch , minimally displaced . There is no pneumothorax or pleural effusion . Lungs are clear . A retrocardiac opacity on the lateral projection may reflect the presence of a hiatal hernia . Cardiomediastinal silhouette appears normal . Clips in the upper abdomen noted .
    OUTPUT:
    
Right eighth and ninth rib fractures . Possible hiatal hernia .