Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable AP view of the chest was provided . The lungs appear clear and well expanded . No supine evidence for effusion or pneumothorax . The heart size is difficult to assess but appears grossly within normal limits . Mediastinal contour appears normal . The imaged bony structures are intact , without signs of displaced rib fracture .
    OUTPUT:
    
No acute traumatic injuries .