Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The hilar and mediastinal contours are normal . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . No displaced rib fractures seen .
    OUTPUT:
    
1 . No pneumothorax or other acute cardiopulmonary process . 2 . No displaced rib fracture is seen .