Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Trauma board obscures some of the film . With this limitation , the lungs are clear . There is no evidence of pneumothorax . Mediastinum is normal . Heart size is normal . No pleural effusion . No rib fractures are identified .
    OUTPUT:
    
No evidence of acute cardiopulmonary process on this trauma radiograph .