Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal upright view of the chest was obtained portably . The lungs are well expanded and clear without focal consolidation , pleural effusion or pneumothorax . Cardiac and mediastinal silhouettes and hilar contours are normal . No displaced rib fracture is seen .
    OUTPUT:
    
No evidence of acute intrathoracic injury .