Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated and clear . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . Known right apical pneumothorax is not clearly visualized . Pneumomediastinum is better assessed on concurrent CT torso . There is no free air under the diaphragm .
    OUTPUT:
    
Pneumomediastinum , better characterized on concurrent CT torso . Tiny right apical pneumothorax is not clearly visualized on the radiograph .