Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . Lung volumes are low . There is no definite focal consolidation , effusion , or pneumothorax . No signs of CHF . Heart and mediastinal contours appear normal . No definite displaced rib fracture is seen .
    OUTPUT:
    
No definite signs of acute traumatic injury .