Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Low lung volumes result in bronchovascular crowding . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . Heart size is normal . Mediastinal silhouette and hilar contours are normal allowing for low lung volumes . No displaced rib fracture is seen . No T - spine fracture is seen , although CT is more sensitive for detection of these .
    OUTPUT:
    
No evidence of acute thoracic injury .